Chapter 1

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Devin Park lived in a brick building on Willow Street that was exactly four stories tall and exactly one hundred years old. He knew it was a hundred years old because his mother had read him the sign on the front wall at least a hundred times. The sign said BUILT 1925 in green metal letters, and two of the letters had fallen off long ago, so really it said BUILT 19 5, which Devin thought sounded like a year a robot might be born.

The building had twelve apartments. It had a front door that stuck in the summer and a back door that froze in the winter. It had a small concrete courtyard with one tired bench and one crooked tree that dropped tiny yellow flowers in the spring. It had a mailroom that smelled like old paper. It had a laundry room in the basement where the dryer made a sound like a spaceship taking off.

But it did not have a playground.

It did not have a garden.

It did not have a slide, or a swing, or a jungle gym, or a tire swing, or even a hopscotch painted on the sidewalk.

"There is nothing to do," Devin said one Saturday morning. He was sitting on the front stoop with his chin in his hands. "Nothing, nothing, nothing."

"There is plenty to do," said Maya Alvarez-Singh, who lived two doors down and was exactly seven and three-quarters years old. She was sitting beside him, eating a granola bar in three neat bites. "We could build something."

"Build what?"

"I don't know yet," said Maya. "But I have the feeling."

Maya's feelings were famous. She had them the way other people had coins in their pockets. She had a feeling once that the pigeon on the fire escape was going to fall, and she caught it in a towel. She had a feeling once that Mrs. Koroleva on the third floor needed help carrying her groceries, and she was right. She had a feeling once that it was going to rain inside the elevator, and that feeling turned out to be wrong, but Maya said feelings were not supposed to be right one hundred percent of the time.

"My feeling," said Maya, finishing her granola bar, "is that something wants to be found."

Devin looked at her. Maya's black hair was in two braids that went down her back, and her eyes were very serious. When Maya got serious, Devin paid attention.

"Okay," he said. "Where do we look?"

"Everywhere."

They started with the roof, which they were not supposed to go on, so they only peeked at it from the top of the stairs. They searched the laundry room, which was empty except for Mr. Okafor's socks tumbling in the dryer. They searched behind the mailboxes. They searched the little alley beside the building, which smelled like garbage and had one beautiful piece of graffiti — a blue whale with stars inside it, painted by someone Devin did not know.

"Nothing," Devin said.

"Wait," said Maya.

They were standing at the bottom of the main staircase. The staircase wound up through the building like a wooden snake, and underneath it, in the very first floor, was a triangle of space. A door. A small door. Nobody ever opened it.

"What's in there?" Devin whispered.

"I don't know," Maya whispered back. "But my feeling is getting louder."

The door was painted the same color as the wall — a sort of tired green — so you almost did not see it unless you were looking. It had an old round doorknob and no lock. Devin tried it.

It opened.

Inside was dust. Inside was dark. Inside was a strange triangular room that sloped low at the back and tall at the front, because the stairs were going up above it. There was a cobweb in one corner. There was a broken broom. There was a cardboard box with nothing in it.

And there was space. Just enough space, Devin thought, for two children and their ideas.

"Oh," Maya said softly.

"Oh," Devin said back.

They stood in the doorway, looking in. A little bit of light came down through a crack above the stairs, and it made a golden stripe across the dusty floor.

"My feeling," Maya said, "was right."

That night, Devin could not sleep. He lay in his bed and stared at the ceiling, and the ceiling looked back. He had a triangle of space inside his head now, and the triangle was humming.

His mother came in to say goodnight. His mother was a nurse and she worked nights sometimes, but tonight she was home. She smelled like lavender soap and a little bit like coffee.

"You are thinking too loud," she said, sitting on the edge of his bed. "I can hear you from the kitchen."

"Umma," he said, which was what he called her. "If you found a room that was empty, what would you put in it?"

She tilted her head. "What kind of room?"

"A small room."

"Just for me?"

"For everyone."

She thought about it for a long time. She was a slow thinker, which Devin liked, because slow thinkers usually gave better answers.

"I would put something beautiful in it," she said at last. "Something that can be shared. Maybe a plant. Maybe music. Maybe —"

"Books?" Devin said.

She looked at him.

"Books would be perfect," she said.

In the morning, Devin met Maya on the stoop. It was early and the courtyard was cool. A pigeon was pecking at a crumb. A bus hissed past on Willow Street.

"I have an idea," Devin said.

"I also have an idea," said Maya.

"You first."

"No, you first."

"Okay. Books."

Maya's eyes went wide as two full moons. "Books," she said. "Books was my idea too."

They high-fived so hard that Devin's hand stung for a minute. Then they sat down on the stoop and made a plan, because Maya said you could not build something without a plan, and Devin said that was probably true.

1. Clean the room under the stairs. 2. Put shelves in it. (They did not have shelves yet. That was a problem for later.) 3. Fill the shelves with books. 4. Tell the neighbors. 5. Let the neighbors take books. 6. Let the neighbors leave books. 7. Be librarians.

"What's a librarian?" Devin asked.

"A librarian is a person who takes care of books," Maya said. "And also helps people find the right one."

"How do you know that?"

"Because I read a book about it," said Maya.

Devin laughed. He laughed so hard that a woman walking her dog turned around to look at him. The dog was a small white dog, and it barked once and then kept going.

"A secret library," Devin said. "Under the stairs."

"Not a secret," Maya said. "A hidden one. There's a difference."

"What's the difference?"

"A secret is something you don't want anyone to know. A hidden thing is something you want the right people to find."

Devin thought about that for a long time afterward. He thought about it while he brushed his teeth. He thought about it while he ate his cereal. He thought about it when he went to bed.

A hidden thing, he decided, was a very good kind of thing to build.

The next day was Sunday. Sunday was a cleaning day in many apartments, and the hallways smelled like lemon spray and fried plantains. Devin and Maya got to work.

First they cleaned.

Devin brought a small broom from his apartment. Maya brought a damp rag and a spray bottle of water. They swept the triangular room, and the dust made them both sneeze. They wiped the walls. They pulled down the cobweb with a long stick and carried it outside very carefully, because there was a tiny spider in it, and Maya did not believe in squishing spiders.

"They eat mosquitoes," she said seriously, putting the spider on the courtyard tree.

"Goodbye, spider," Devin said.

The spider did not answer, which was normal for spiders.

They cleaned for a whole hour. When they were done, the little room looked different. It was still small. It still sloped low at the back. But it smelled like clean wood now, and the stripe of light coming through the crack seemed brighter, as if the room were happier.

"Now," Maya said. "Books."

They went to Devin's apartment first.

Devin had a lot of books. He had books from his mother, who bought them used from the thrift shop. He had books from the library, but those he could not give away, because they had to go back. He had books his grandmother had sent from Seoul, which were written in Korean and had beautiful pictures.

He picked three from his shelf.

The first was a book about a small fox who was afraid of the moon and learned to love it. It had a blue cover. It was one of his favorites, but he was ready to share.

The second was a book about a boy who planted a seed in a sidewalk crack, and the seed grew into a tree, and the tree grew into a forest.

The third was a book about the planets. He could almost recite it by heart now, so he thought it was time for somebody else to have it.

Then they went to Maya's apartment.

Maya lived with her mother, her father, her grandmother, and a cat named Noodle. The apartment smelled like cardamom and old wood. Her grandmother was sitting by the window, doing a crossword puzzle. She waved without looking up.

Maya picked two books.

The first was a book of poems for children. It had a soft yellow cover and a drawing of a whale on the front.

The second was a book about a girl who traveled around the world in a hot-air balloon, meeting strange and kind people in every country she visited.

"Five books," Devin said, when they were back in the hall.

"Five is a good beginning," Maya said.

They carried their five books down to the triangular room. They did not have shelves, so they stacked them very neatly on the cardboard box, which Maya had flipped upside down to make a little table.

It did not look like much.

Five books, on a cardboard box, in a small triangle of dusty light.

"It looks like the beginning of something."

"It looks like a library," Devin whispered.

"Our library."

The next problem was that nobody knew the library was there.

A hidden thing could only be found if the right people knew to look. Maya pointed this out while they were eating graham crackers on the stoop.

"We need a sign," she said.

"What should it say?"

Maya thought. She chewed. She swallowed.

"It should say what it is. And what to do."

So they went up to Devin's apartment, and they got a piece of cardboard from the recycling bin, and they got two markers — a black one and a red one. They lay on the living room floor with the cardboard between them, and Devin held the edge steady while Maya wrote.

TAKE A BOOK. LEAVE A BOOK. THE STAIR LIBRARY.

She wrote it in big, careful letters. Then she drew a little book in the corner, and a little star next to the book.

"Why a star?" Devin asked.

"Because every book is a little bit of light," Maya said.

Devin did not argue with that, because he thought she might be right.

They taped the sign to the inside of the small door, so that anyone who opened the door would see it. Then they stood back and admired it.

"Now what?" Devin asked.

"Now we wait," said Maya.

Waiting, it turned out, was the hardest part.

Devin and Maya took turns sitting on the stoop and watching the building. Every time someone came in or out of the front door, they held their breath. Every time someone walked past the little door under the stairs, they watched to see if the person would notice.

Most people did not notice. Most people were in a hurry. Most people were carrying groceries, or a laundry basket, or a baby.

On Monday, nobody opened the door.

On Tuesday, nobody opened the door.

On Wednesday afternoon, Devin came home from school and went straight to the triangular room, and he counted the books.

Five.

Still five.

"Maybe nobody wants a library," he said to Maya, who was sitting on the stoop doing her math homework.

"Somebody wants a library," Maya said, without looking up. "Maybe they just haven't found it yet."

On Thursday, Devin had to go to the dentist. When he came home, his mouth tasted like mint and rubber. He dragged his feet down the sidewalk. He opened the front door of the building. He walked past the little door under the stairs.

And then he stopped.

He walked back.

He opened the little door.

There were six books on the cardboard box.

Six.

One of them was new.

For the children. From Mrs. Koroleva, 3A.

"Maya," Devin whispered. "Maya, Maya, Maya."

He ran to Maya's apartment and pounded on the door. Maya opened it with a towel on her head, because she had just come from the pool.

"Somebody left a book," Devin said, out of breath. "Mrs. Koroleva left a book."

Maya's eyes went wide.

They ran back down the stairs. They opened the little door. They picked up the green book with its curling letters, and they opened it, and inside were beautiful pictures — a bear in a forest, a girl with a red scarf, a village with snow on the rooftops.

"It's Russian," Maya said.

"How do you know?"

"My cousin knows Russian. And besides, Mrs. Koroleva is from Ukraine, but she speaks Russian too, and she told me once that her grandchildren live far away and don't know the language yet."

"So why did she leave it here?"

Maya held the book very gently, as if it were alive.

"Because," she said, "she wants somebody to read it. Even if she can't be the one to read it to them."

Devin felt the warm candle in his chest again.

The library was not just five books anymore.

The library was six books.

And one of them was a gift.

After Mrs. Koroleva, things began to happen.

On Friday, two more books appeared — a picture book about trucks and a picture book about a mouse who lived in a teacup. There was no note, but Devin and Maya guessed these were from someone small.

These are the stories my grandfather told me. I hope they find a young heart. — Mr. Okafor, 2B.

"Mr. Okafor!" Devin said. "He is the man with the big laugh!"

"And the socks in the dryer," Maya added.

On Sunday, four coloring books appeared, all from the Ramirez twins on the fourth floor, who were five years old and twins and named Lucia and Luca. Their mother must have helped them leave the books, because the twins were not tall enough to reach the door handle without help.

By Tuesday, there were nineteen books.

Nineteen!

Devin and Maya stood in the little triangular room and looked at the cardboard box, which was now overflowing. Books were stacked on the floor. Books were wedged against the walls. One book had fallen behind the broken broom.

"We have a problem," Maya said.

"We have the best problem," Devin said.

"We need shelves."

This was indeed a problem. Shelves cost money. Shelves were heavy. Shelves required a grown-up, and they were not sure which grown-up to ask.

In the end, they asked Maya's father.

Maya's father was a man with a kind face and big hands. He worked in a warehouse where they sold wood, and he had built the kitchen table and the bookshelf in Maya's bedroom with his own tools. When Maya told him about the library, he listened very carefully. He did not laugh. He did not say they were too small. He did not say it was silly.

He just said, "How tall are the shelves going to be?"

"As tall as a seven-year-old," Maya said.

"But not taller," Devin added.

Maya's father nodded like a general receiving orders.

That Saturday, he came down to the triangular room with two wooden planks, four wooden legs, a box of nails, and a hammer. He measured. He sawed. He hammered. Maya handed him nails. Devin held the planks steady. Noodle the cat came down to supervise and then lost interest and went upstairs.

By the end of the afternoon, there were real shelves in the library.

Three shelves. Two wooden walls. No back, because the wall of the building was the back. Maya's father had sanded the edges so that nobody would get splinters, and he had painted the wood a soft cream color, because Maya had said that books looked prettier against cream.

"Thank you, Papa," Maya said.

"Thank you, Mr. Alvarez-Singh," Devin said.

Maya's father looked at the shelves. He looked at the stack of books on the floor. He looked at the cardboard box, now demoted to a sign-holder.

"You know," he said slowly, "when I was a boy in Mumbai, there was a little library on our street. A woman named Auntie Pinto ran it out of her window. You could go there every evening and take a book, and when you finished it, you brought it back."

"That's like ours," Devin said.

"That's exactly like yours," said Maya's father. "I am glad this building has an Auntie Pinto now. Two of them, actually."

Maya smiled so big her cheeks hurt.

Devin felt the candle in his chest grow into a whole little fireplace.

Being a librarian was more work than Devin had imagined.

Every day after school, he and Maya checked the library. They organized. They dusted. They made sure no books were upside down, because Maya said books got confused if they were left upside down too long.

They decided to organize by category.

They made little signs for each shelf out of index cards. They taped them up with scotch tape.

Neighbors started coming more often now.

Mrs. Koroleva came every Tuesday at exactly four o'clock. She did not take books, but she always brought one — a little gift from the box in her closet, she said. Sometimes she brought Ukrainian books, sometimes Russian, and once she brought a book in English about a cat who lived in a bakery.

"I buy from thrift store," she told Devin one day. "Is five cents, ten cents. Is nothing. But in library, is everything."

She patted his cheek with a cold hand and walked away.

Mr. Okafor came on Saturdays, usually after he did his laundry. He would stand in the little room, hands on his hips, and read the titles out loud to himself.

"This one, I know," he would boom. "This one, I do not know. This one — ah! This one, I loved as a boy."

He would take two books at a time. He always brought them back the next Saturday, and he always left a different two in their place.

The Ramirez twins came with their mother almost every day. They could not read yet, but they loved the pictures. Lucia liked books with animals in them. Luca liked books with machines. They would sit on the triangular floor and turn pages and whisper to each other in a mix of English and Spanish.

The Jones brothers stopped by less often, but when they did, they left behind gifts. A worn paperback about a boy and a dragon. A graphic novel that Maya was not quite sure their mother would approve of, which she quietly moved to the bottom shelf.

The library was alive.

The library was a living thing.

And Devin and Maya were its keepers.

Every building has somebody in charge, and on Willow Street, the somebody in charge was a man named Mr. Thorpe.

Mr. Thorpe was the landlord. He owned the building. He also owned three other buildings on other streets, so he did not live in any of them. He came once a week, usually on Wednesday mornings, in a gray car that was always slightly dusty. He wore a gray coat and gray pants and carried a clipboard with many papers on it.

Devin had seen him maybe ten times in his life. Mr. Thorpe did not smile. Mr. Thorpe did not say hello. Mr. Thorpe checked things — the mailboxes, the lights in the hallway, the front stoop — and then he got back in his gray car and drove away.

One Wednesday in October, Mr. Thorpe came and stayed longer than usual.

Devin was coming home from school. He saw Mr. Thorpe standing near the little door under the stairs. Mr. Thorpe had the door open. Mr. Thorpe was staring inside.

Devin's stomach dropped into his shoes.

He walked very slowly up to the front of the building. He did not say anything. He did not breathe, almost. He hoped Mr. Thorpe would just close the door and leave.

But Mr. Thorpe did not close the door.

Mr. Thorpe turned around and saw Devin.

"Young man," said Mr. Thorpe. His voice was dry, like paper. "Do you know what this is?"

"A library," Devin whispered.

"A fire hazard," said Mr. Thorpe.

Devin swallowed. He looked up at Mr. Thorpe's face, which was lined and serious and a little bit tired.

"It is also a library," Devin said, a little louder.

Mr. Thorpe shook his head. "This cannot stay here. There are city codes. Books under a staircase — this is combustible material. If there is a fire in this building, it will spread twice as fast because of this. I have to remove it."

"But —"

"I will send someone on Saturday," said Mr. Thorpe. "They will take out the shelves. They will take out the books. They will clean the space. I am sorry. This is a safety issue."

And then, because Mr. Thorpe was the kind of man who said his piece and walked away, he walked away.

Devin stood in the hallway for a long time. He did not cry. He was not quite sad enough to cry. He was more — he was scared. He was scared the way you get scared when you realize something beautiful has a clock ticking over it.

He went upstairs and knocked on Maya's door.

Maya answered. Maya saw his face.

"Oh no," she said. "What happened?"

Devin told her.

Maya's eyes did not fill with tears. Maya's eyes got very, very hard — like two little black stones.

"No," she said. "No, no, no."

"He said Saturday," Devin said.

"That is three days."

"Yes."

"Three days is a lot of time," Maya said. "Three days is enough for many things."

"Like what?"

Maya grabbed a piece of paper from her desk. She grabbed a pen.

"Like a petition," she said.

A petition, Maya explained, was a list of people who agreed about something. If you got enough names, it meant something. It meant the people who lived in the building wanted the library. It meant it was not just two kids.

WE THE NEIGHBORS OF 1925 WILLOW STREET BELIEVE THE STAIR LIBRARY SHOULD STAY. WE WILL HELP KEEP IT SAFE.

"That's good," Devin said.

"Now we need signatures."

They started with Mrs. Koroleva.

Mrs. Koroleva opened her door in her slippers and her flowered apron. She listened while Maya explained. Her face grew longer and longer.

"He wants to take away my library?" she said.

"Yes."

"But I gave books," she said. "I gave many books."

"We know."

"Where is paper? Give me pen."

Next, Mr. Okafor.

Mr. Okafor laughed when he heard, but it was not a happy laugh. It was the laugh of a man who could not believe the world.

"The library?" he said. "The little library with my folktales in it? He wants to throw it away?"

"Yes."

"This man, this Thorpe — does he read?"

"We don't know."

The Ramirez family was next. The twins did not understand very much, but their mother understood. She signed for herself and wrote the twins' names underneath in her own handwriting, with little hearts over the Is. She also said she would come to the courtyard and shout if she had to.

The Jones brothers signed, and so did their father, who opened the door in a bathrobe and said "absolutely, for sure" before they had even finished explaining.

The woman on the first floor — a tall woman named Ms. Hasan who played the cello at a symphony — signed. She also said she would write a letter to the city if necessary, because she had written many letters to the city before, and she was very good at it.

Mr. and Mrs. Rivera, who lived next to the laundry room, signed. They had four grown children who had all moved away, and they said the library had become one of their favorite parts of the building.

By Thursday evening, Devin and Maya had knocked on every door in the building.

By Thursday evening, every single apartment had signed the petition.

Twelve apartments. Thirty-four names. Two pages of signatures, with hearts and notes in the margins.

"Now what?" Devin asked.

"Now," said Maya, "we call a meeting."

A meeting, Maya said, was when people came together to talk about something important, and then decided together what to do.

Maya's grandmother helped them write a notice. They made twelve copies of it — one for each apartment. They slid a copy under each door.

IMPORTANT NEIGHBOR MEETING In the courtyard About the Stair Library Please come! — Devin and Maya, the Librarians

On Friday, Devin could not eat his lunch. He could not focus in school. He looked out the window every few minutes, because the sky was gray and he was worried it would rain, and nobody would want to come to a meeting in the rain.

After school, he ran home.

The sky was still gray. But the rain had not come.

At five o'clock, Maya knocked on his door. She was holding a small piece of paper covered in scribbles.

"What is that?" Devin asked.

"My speech," she said.

Devin's stomach flipped. "We have to give speeches?"

"I have to give one," Maya said. "You have to give one too."

"I can't."

"You can."

"Maya, I can't. I'm — I don't talk to grown-ups very well. I mumble. I forget words."

Maya looked at him. Her eyes were very steady.

"Devin," she said. "You don't have to be loud. You just have to be true. Say the thing that is true. That's what a speech is."

"What's true?"

"Only you know."

Devin went into his room. He sat on his bed. He thought about the library. He thought about the candle in his chest. He thought about Mrs. Koroleva's loopy signature, and Mr. Okafor's angry comma, and the twins drawing pictures on the floor.

He thought about a book his grandmother had sent him last year. It was a book of quotes that his family read together sometimes. There was one he remembered. It was about the earth being one country.

He pulled the book off his shelf. He marked the page with his finger. He put it in his pocket.

Then he went down to the courtyard.

Every neighbor had come. Even the ones they had barely met — the woman from 4C with the big headphones, the old man from 1A who never spoke English, the young couple from 2D who had just moved in last month. They brought folding chairs from their apartments. They brought Mrs. Rivera's thermos of hot chocolate. They brought the Ramirez twins, who were already asleep on their mother's shoulders.

And at the back of the crowd, in a gray coat, stood Mr. Thorpe.

Devin almost did not see him at first. Mr. Thorpe was not trying to be seen. He was just standing there, his clipboard under his arm, his face unreadable.

"He came," Devin whispered.

"Of course he came," Maya whispered back. "He's a landlord. Landlords always come when tenants call."

Mrs. Koroleva started the meeting.

She stood on the little bench in the middle of the courtyard. She raised her hand, and everyone quieted down.

"Friends," she said. "Our library is in trouble. The children will tell us. Please listen with your hearts."

Maya went first.

Maya was not nervous. Maya had never been nervous in her life, as far as Devin could tell. She climbed onto the bench. She unfolded her speech. She read it out loud, in a clear, high voice.

"Our library is small," she read. "It is only a triangle under the stairs. But big things can be small at first. A tree is a seed first. A river is a drop first. A whole forest is one little root first.

"Our library has nineteen — no, twenty-seven — books. Every book in it was given by a neighbor. Every book in it is a piece of somebody's heart. When we read a book, we borrow a heart for a little while.

"Mr. Thorpe says it is a fire hazard. We want to be safe. We love our building. But we think there is a way to be safe and to have a library too. We think there is a way."

She looked up from her paper.

"We are asking you to help us find the way."

Some people clapped. Mrs. Koroleva wiped her eyes. Mr. Okafor nodded so hard his whole body shook.

Then Maya looked at Devin.

"Your turn," she mouthed.

Devin's legs felt like noodles. He walked to the bench. He climbed up. He looked out at the neighbors, and the neighbors looked back at him, and his heart was beating so hard he thought it might come out of his shirt.

He did not have a speech written down.

He took the book out of his pocket.

"I —" he started. He swallowed. "I have something I want to read."

His voice was very small.

"Louder, sweetheart," Mrs. Rivera called gently.

He took a breath. He tried again.

"There is a line in this book that my grandmother sent me," he said. "It is a line I think about a lot. It says — it says that the earth is but one country, and mankind its citizens."

He paused.

"I think," he said slowly, "that a building is a tiny country. And we are all citizens of it. And when we share books, we are being citizens together.

"Mrs. Koroleva gave us Russian books, even though her grandchildren don't live here. Mr. Okafor gave us his grandfather's folktales. The twins gave us coloring books. The Jones brothers gave us manga. We all gave things. We all took things. We all became — I don't know the word — we became —"

"A family," someone said from the crowd. It was Mr. Alvarez-Singh, Maya's father.

"Yes," said Devin. "A family."

He looked down at his feet, because he was starting to feel shy again. Then he looked up, because he had one more thing to say.

"Please don't take it away," he said. "Please. We can make it safer. We will do whatever you need. But please don't take it away."

There was a moment of silence.

Then everyone began to clap.

Everyone.

Even Mr. Thorpe, in the back, gave three small, quiet claps with his gray hands.

After the clapping, Mr. Thorpe stepped forward.

The crowd parted for him. He walked to the bench, and Devin and Maya climbed down, and Mr. Thorpe stood where they had been standing. He cleared his throat. He looked at the clipboard under his arm, and then he put the clipboard down on the ground, as if it had gotten too heavy.

"I am not a cruel man," he said.

Nobody answered.

"I have rules," he said. "I have inspectors who come. If there is a fire in this building and books under the stairs are part of the fuel, I am responsible. Not just for the damage. For the people. I have been responsible for buildings for thirty years. I have seen fires. I have seen —" He paused. He looked down. "I have seen things I do not want to see again."

The crowd was very quiet.

"But," said Mr. Thorpe, "I have also seen tonight something I have not seen in a long time."

He looked around at the courtyard. At the neighbors. At the empty lawn chairs and the crooked tree.

"I grew up in a building like this," he said. "When I was a boy in Michigan, the neighbors knew each other. The neighbors sat in the hallway on hot summer nights. The neighbors left pies at each other's doors. I have lived a long time, and I have not seen that in many years. But I saw it in this courtyard tonight." He stopped. He cleared his throat. "So."

He looked at Devin. He looked at Maya.

"I have a proposal," he said. "A compromise. We cannot have books under the stairs. The code will not allow it. But — what if we build real shelves in this courtyard? Weatherproof shelves. Something with a little roof over it. Something that meets the fire code. Something legitimate."

A murmur went through the crowd.

"I will pay for half the materials," said Mr. Thorpe. "If the neighbors are willing to pay for the other half, I will have a proper library box built here, against that wall there." He pointed to the wall of the building, where the crooked tree grew. "The children will run it. These two." He nodded at Devin and Maya. "The Librarians."

Mr. Okafor raised a hand.

"I will pay," he said.

"I also," said Mrs. Koroleva.

"And us," said the Ramirez mother.

Ms. Hasan, the cellist, raised her hand. Mr. Rivera raised his. The Jones father. The young couple from 2D. One by one, every apartment in the building put a hand up.

Mr. Thorpe nodded. He looked — Devin could hardly believe it — a little bit like he might cry.

"Then it is decided," he said. "We will build it next Saturday."

Mrs. Koroleva climbed back on the bench.

"I will bring borscht," she announced.

"I will bring jollof rice," said Mr. Okafor.

"We will bring pupusas," said the Ramirez mother.

"I will bring my cello," said Ms. Hasan.

Devin looked at Maya.

Maya looked at Devin.

They did not say anything. They did not need to. They just grinned so hard that their faces almost split in two.

Saturday came slowly and quickly at the same time.

The courtyard was busy from early in the morning. Maya's father was there with a measuring tape. Mr. Thorpe was there in jeans and an old t-shirt, which was the most surprising thing Devin had seen all week. Mr. Okafor was there with a toolbox. Mr. Rivera was there with sandpaper. Even the twins were there, pretending to hammer with plastic toy hammers that did not actually hammer anything.

The library box was beautiful.

It was a tall wooden cupboard with a slanted little roof, like a tiny house. It had glass doors, so you could see the books inside from the courtyard. It had three shelves. It stood next to the crooked tree, which was blooming its tiny yellow flowers again, because spring had come around.

When the last nail was hammered in, Mr. Thorpe stepped back.

"This," he said, "is a good library."

He reached into his coat pocket. He pulled out a book. It was an old paperback, soft from being read many times. The cover was faded blue.

Poems by Mary Oliver.

"This was my wife's favorite," Mr. Thorpe said. He looked at the book for a long moment. "She died two years ago. I have been keeping this on my desk. I think — I think she would like it to be here."

He handed it to Devin.

Devin took it very carefully, as if it were made of glass.

"She will take good care of it," Maya said. "We promise."

"Books should be shared," Mr. Thorpe said. "I had forgotten that."

He put his hand on Devin's shoulder. He did not smile, exactly, but the lines on his face softened, and for a moment he looked like a boy in Michigan, a long time ago, sitting in a hallway on a hot summer night.

Then he picked up his clipboard and walked to his gray car and drove away.

But before he went, he turned back.

"I'll be here next Wednesday," he called. "To borrow a book."

Time passed.

The new library filled up. The twenty-seven books became fifty, became eighty, became more than a hundred. Some books came. Some books went. Some books went on long journeys and came back with sand in their pages, as if they had been to the beach. Some books came back with crayon drawings on the last page, little gifts from the Ramirez twins. Some books came back smelling faintly of curry, or coffee, or somebody's perfume.

Every book that came back had lived a little life somewhere in the building.

Summer came, hot and sticky. The courtyard became the place where the building lived. Mrs. Koroleva brought out a folding chair every evening and sat with her crossword. Mr. Okafor played dominoes with the old man from 1A, who, it turned out, was actually a very good dominoes player and also spoke more English than anybody had realized. Ms. Hasan practiced her cello sometimes, filling the courtyard with slow, honey-colored music.

The library became a place.

And Devin and Maya were still the Librarians.

They had a notebook now, where they wrote down ideas for the library. They had a schedule — Mondays and Wednesdays, Devin dusted; Tuesdays and Fridays, Maya organized; Saturdays were for big restocking, when they went through all the books and put them back in order.

Mr. Thorpe came every Wednesday. He always borrowed one book and returned the book from the week before. He began to nod at people in the hallway. He began to say good morning. One day he brought a small potted plant — a spider plant with long green leaves — and set it on top of the library box. "For the library," he mumbled, and walked away before anyone could thank him.

One evening in July, Devin and Maya sat on the courtyard bench, eating popsicles. The popsicles were grape. Their tongues had turned purple.

"You know what I wonder?" Devin said.

"What?"

"What is under the stairs now?"

Maya looked at him. Her eyes lit up.

"Let's check."

They slipped through the front door. The hallway was cool and dim. The little door under the stairs was closed. Nobody used it for anything anymore — not even for storage.

They opened the door.

The triangular room was empty.

The shelves had been taken down. The books had moved to their proper home in the courtyard. The dust had settled again. The stripe of light came down through the crack above, golden and slow.

"Do you remember?" Maya whispered.

"Of course I remember."

"We built a whole library in here."

"We built more than that," Devin said.

"What do you mean?"

Devin thought about it. He thought about the petition. He thought about the meeting. He thought about Mr. Thorpe's face when he handed over his wife's book of poems. He thought about Mrs. Koroleva's loopy handwriting. He thought about the Ramirez twins asleep on their mother's shoulders. He thought about how he had not known any of these people a year ago, not really. He had seen them. He had said hello sometimes. But he had not known them.

Now he knew them. Now they knew him.

"We built a family," he said.

Maya nodded.

They stood there for a long time, in the empty triangle, breathing the slow, dusty air. Outside, the courtyard was full of voices. Somebody laughed. Somebody called a child home for dinner. The cello hummed a low, warm note.

"We should do it again someday," Maya said.

"Do what?"

"Find a hidden place. Make something out of nothing. Share it with everybody."

Devin smiled.

"We will," he said.

They closed the door softly behind them, and they went back out into the courtyard, where the summer evening was waiting, and the neighbors were waiting, and all the books, waiting too, with their hearts full of light.

THE END

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AUTHOR'S NOTE

A great teacher once wrote that the earth is but one country, and mankind its citizens. That is a huge idea. But huge ideas grow from tiny soil. Every apartment building, every street, every courtyard is a small country of its own. When we share a book, or a meal, or a kind word with the family next door, we are citizens together.

You do not need to be tall to build something beautiful. You do not need to be grown to change the place where you live. A book, a shelf, a friend, a little bit of courage — sometimes that is enough to begin.

What will you build where you live?

— Crimson Ark Publishing