Books published by publisher Walden Pond Press

“The pleasures of the novel go far beyond the crackling, breathless plot and the satisfaction of watching the puzzle fall into place. The book is shot through with humor, both laugh-out-loud and subtle.” —New York Times Book ReviewFrom National Book Award finalist and Printz Award winner Laura Ruby comes an epic alternate history series about three kids who try to solve the greatest mystery of the modern world: a puzzle and treasure hunt laid into the very streets and buildings of New York City. It was 1798 when the Morningstarr twins arrived in New York with a vision for a magnificent city: towering skyscrapers, dazzling machines, and winding train lines, all running on technology no one had ever seen before.Fifty-seven years later, the enigmatic architects disappeared, leaving behind for the people of New York the Old York Cipher—a puzzle laid into the shining city they constructed, at the end of which was promised a treasure beyond all imagining. By the present day, however, the puzzle has never been solved, and the greatest mystery of the modern world is little more than a tourist attraction.Tess and Theo Biedermann and their friend Jaime Cruz live in a Morningstarr apartment—until a real estate developer announces that the city has agreed to sell him the five remaining Morningstarr buildings. Their likely destruction means the end of a dream long held by the people of New York.And if Tess, Theo, and Jaime want to save their home, they have to prove that the Old York Cipher is real. Which means they have to solve it."An epic mission to solve one of the greatest mysteries of their time. I loved this book. It is full of twists and turns" (from the Brightly.com review, which named York: The Shadow Cipher one of the best books of 2017).

The life of crime is good. Mac has taken down legendary high school crime boss Staples, business has been booming, and Mac and Vince are getting ready for middle school baseball tryouts. But this can't last. Especially when a new vice principal is bent on destroying their operation, and Mac and Vince meet the new girl at school, an eighth grader with a mean look who goes by the name Trixie Von Parkway. Mac has always tried to keep his friends close and his enemies closer. But what do you do when you can't tell the difference?

“Considering the fresh attention being paid to teaching a skeptical approach to information evaluation, this series opener couldn’t be better timed. A brief but savvy guide to responsible research methods adds further luster to this crowd pleaser.” —ALA Booklist (starred review)Two Truths and a Lie is the first book in a fascinating new series that presents some of the most crazy-but-true stories about the living world as well as a handful of stories that are too crazy to be true—and asks readers to separate facts from fakes! This nonfiction chapter book is an excellent choice to share during homeschooling, in particular for children ages 7 to 9 who are reading independently. It’s a fun way to keep your child engaged and as a supplement for activity books for children.Did you know that there is a fungus that can control the mind of an ant and make it do its bidding? Would you believe there is such a thing as a corpse flower—a ten-foot-tall plant with a blossom that smells like a zombie? How about a species of octopus that doesn’t live in water but rather lurks in trees in the Pacific Northwest?Every story in this book is strange and astounding. But not all of them are real. Just like the old game in this book’s title, two out of every three stories are completely true and one is an outright lie. Can you guess which? It’s not going to be easy. Some false stories are based on truth, and some of the true stories are just plain unbelievable. And they’re all accompanied by dozens of photos, maps, and illustrations. Amaze yourself and trick your friends as you sort out the fakes from the facts!Acclaimed authors Ammi-Joan Paquette and Laurie Ann Thompson have teamed up to create a series of sneaky stories about the natural world designed to amaze, disgust, and occasionally bamboozle you.

“As puzzle pieces click into place, The Missing Piece of Charlie O’Reilly reveals that it’s stories—and family—that make us whole. A deeply satisfying and beautiful book.” —Elana K. Arnold, National Book Award finalist and author of The Question of MiraclesCharlie O’Reilly is an only child. Which is why it makes everyone uncomfortable when he talks about his brother.Liam. His eight-year-old kid brother, who, up until a year ago, slept in the bunk above Charlie, took pride in being as annoying as possible, and was the only person who could make Charlie laugh until it hurt.Then came the morning when the bunk, and Liam, disappeared forever. No one even remembers him—not Charlie’s mother, who has been lost in her own troubles; and not Charlie’s father, who is gone frequently on business trips. The only person who believes Charlie is his best friend, Ana—even if she has no memory of Liam, she is as determined as Charlie is to figure out what happened to him.The search seems hopeless—until Charlie receives a mysterious note, written in Liam’s handwriting. The note leads Charlie and Ana to make some profound discoveries about a magic they didn’t know existed, and they soon realize that if they're going to save Liam, they may need to risk being forgotten themselves, forever.Rebecca K.S. Ansari’s debut novel is a stunning contemporary fantasy about love, loss, and the power to forgive that we all have inside us—even if we sometimes forget that it’s there.

Three starred reviewsA Publishers Weekly Best Children’s Book of 2019Anne Ursu, author of the National Book Award nominee The Real Boy, returns with a story of the power of fantasy, the limits of love, and the struggles inherent in growing up.When you’re an identical twin, your story always starts with someone else. For Iris, that means her story starts with Lark.Iris has always been the grounded, capable, and rational one; Lark has been inventive, dreamy, and brilliant—and from their first moments in the world together, they’ve never left each other’s side. Everyone around them realized early on what the two sisters already knew: they had better outcomes when they were together.When fifth grade arrives, however, it's decided that Iris and Lark should be split into different classrooms, and something breaks in them both.Iris is no longer so confident; Lark retreats into herself as she deals with challenges at school. And at the same time, something strange is happening in the city around them, things both great and small going missing without a trace.As Iris begins to understand that anything can be lost in the blink of an eye, she decides it’s up to her to find a way to keep her sister safe.

Crazy-but-true stories about the natural world make this acclaimed nonfiction series perfect for fans of curiosities and wonders—and anyone looking to explore ways to separate fact from fiction. This nonfiction chapter book is an excellent choice to share during homeschooling, in particular for children ages 7 to 9 who are reading independently. It’Did you know that too many fidget spinners spinning in the same direction could have an adverse effect on Earth’s gravitational field? Or that the remains of a deceased loved one can be turned into a diamond? Or that the loudest known sound in history was made by a volcanic eruption in 1883, with the echoing blast circling the planet more than three times?Welcome to Two Truths and a Lie: Forces of Nature! You’ve heard of the game: Every story in this book is strange and astounding, but one out of every three is an outright lie. Picking out the fakes isn’t as easy as you think, however. Some false stories are based on truth, and some of the true stories are just plain unbelievable! Don’t be fooled by the photos that accompany each story—it’s going to take all your smarts and some clever research to ferret out the truth.From a man who gave himself an appendectomy to radio signals from other planets to eagles that have been trained to take out spy drones, the stories in this third installment in the Two Truths and a Lie series will amaze you! Just don’t believe everything you read. . . .

The story of Mac, Vince, and middle-school organized crime comes to its thrilling conclusion in the third book of Chris Rylander’s Fourth Stall saga, a series that combines a Godfather-like tale of crime and betrayal with hilarious school comedy à la Jack Gantos.Their business is finished, and Mac’s and Vince’s lives have become something they have never been before—simple. None of the fortune or the glory, none of the risk or the threat of juvenile prison. There’s even a new business that has stepped in to take its place (and take the heat off Mac and Vince for once). Things couldn’t be better.But that was before things at their middle school started to go haywire. Before they found out that there’s a new crime boss at a school another town over trying to consolidate power. And before their old nemesis, Staples, came back to town begging for help after his stint in the clink. Just when Mac and Vince thought they were out, the business pulls them back in. But this time, will they be able to escape with their lives and their permanent records intact?

From Chris Rylander, author of the breakout hit Fourth Stall saga, comes the third book in the Codename Conspiracy series—an incredibly funny and clever mash-up of middle grade school story and spy adventure, perfect for fans of Gordon Korman.There is a computer program so unspeakably powerful that its mere existence is unknown to all but the most senior government agents. This computer program is capable of controlling every aspect of communication, transportation, and defense on the planet. This computer program must never fall into the wrong hands or civilization as we know it will be utterly destroyed.This computer program is in North Dakota.Carson Fender, aka the retired Prank Master, aka Agent Zero, aka the all-in-one World's Greatest Hero and World's Greatest Screwup, must protect this program, codenamed Exodus. He is paired once again with his best friend, Danielle, aka Agent Atlas. Together, they must expose an enemy agent working from inside their school—an enemy agent with the mandate to stop at nothing to help secure Exodus. Can Zero and Atlas foil this enemy before it is too late? Carson's final mission will test his loyalty, smarts, and courage as never before.

The conclusion to Kevin Emerson’s epic, which Tui Sutherland, New York Times bestselling author of the Wings of Fire series, has called “perfect science fiction.”It is Earth year 2256—but the fate of the few who even remember Earth is perilously in doubt. Mina Saunders-Chang and many of the surviving humans are stranded in the Centauri system, having barely survived their confrontation with the Telphon refugees. Now everyone—human and Telphon alike—is caught in the blast zone of the Centauri supernova. And yet there’s only one question Mina is asking:Where are Liam and Phoebe?Having barely made it through the battle at the Centauri system with their lives, Liam and Phoebe awake on a mysterious ship in the middle of a dead universe. The ship bears the markings of a human starliner that disappeared decades ago—but even more disturbing than that is the massive alien machine floating in the starless space before them.A machine long abandoned but now showing signs of life. A machine that has begun speaking to Liam in a voice only he can hear. . . .

“Last Day on Mars is thrillingly ambitious and imaginative. Like a lovechild of Gravity and The Martian, it's a rousing space opera for any age, meticulously researched and relentlessly paced, that balances action, science, humor, and most importantly, two compelling main characters in Liam and Phoebe. A fantastic start to an epic new series.” —Soman Chainani, New York Times bestselling author of the School for Good and Evil series“Emerson's writing explodes off the page in this irresistible space adventure, filled with startling plot twists, diabolical aliens, and (my favorite!) courageous young heroes faced with an impossible task.” —Lisa McMann, New York Times bestselling author of the Unwanteds seriesIt is Earth year 2213—but, of course, there is no Earth anymore. Not since it was burned to a cinder by the sun, which has mysteriously begun the process of going supernova. The human race has fled to Mars, but this was only a temporary solution while we have prepared for a second trip: a one-hundred-fifty-year journey to a distant star, our best guess at where we might find a new home.Liam Saunders-Chang is one of the last humans left on Mars. The son of two scientists who have been racing against time to create technology vital to humanity’s survival, Liam, along with his friend Phoebe, will be on the last starliner to depart before Mars, like Earth before it, is destroyed. Or so he thinks. Because before this day is over, Liam and Phoebe will make a series of profound discoveries about the nature of time and space and find out that the human race is just one of many in our universe locked in a dangerous struggle for survival.

"Thrillingly ambitious and imaginative." —Soman Chainani, bestselling author of The School for Good and Evil, about Last Day on MarsIt is Earth year 2223, but the Earth, along with the entire solar system, is gone.Liam and Phoebe, having barely escaped our exploding sun with their lives, are in stasis for the decade-long journey to the rogue planet Delphi, where they hope to meet up with the rest of the human refugees, find help for their injured parents, and pass along the devastating things they discovered on Mars: that someone destroyed their world intentionally, and that that someone might still be after them, trying to finish the job.Phoebe is carrying her own dark secret. One that finds her waking up secretly at various points in their journey, changing their path through space. One that will decide the fate of the human race, and many more besides. One that, very soon, she must reveal to Liam, whether he’s ready for the truth or not. The second volume in Kevin Emerson's thrilling sci-fi epic is a bold and terrifying quest into the outer reaches of time and space—one that will change our heroes, and their friendship, forever.

Three starred reviewsA Publishers Weekly Best Children’s Book of 2019Anne Ursu, author of the National Book Award nominee The Real Boy, returns with a story of the power of fantasy, the limits of love, and the struggles inherent in growing up.When you’re an identical twin, your story always starts with someone else. For Iris, that means her story starts with Lark.Iris has always been the grounded, capable, and rational one; Lark has been inventive, dreamy, and brilliant―and from their first moments in the world together, they’ve never left each other’s side. Everyone around them realized early on what the two sisters already knew: they had better outcomes when they were together.When fifth grade arrives, however, it's decided that Iris and Lark should be split into different classrooms, and something breaks in them both.Iris is no longer so confident; Lark retreats into herself as she deals with challenges at school. And at the same time, something strange is happening in the city around them, things both great and small going missing without a trace.As Iris begins to understand that anything can be lost in the blink of an eye, she decides it’s up to her to find a way to keep her sister safe.