For 12-year-old Emily, the best thing about moving to San Francisco is that it's the home city of her literary idol: Garrison Griswold, book publisher and creator of the online sensation Book Scavenger (a game where books are hidden in cities all over the country and clues to find them are revealed through puzzles). Upon her arrival, however, Emily learns that Griswold has been attacked and is now in a coma, and no one knows anything about the epic new game he had been poised to launch.

As the Germans waged a brutal war across Europe, details of every Nazi plan, every attack, every troop movement were sent over radio. But to the Allied troops listening in―and they were always listening―the crucial messages sounded like gibberish. The communications were encoded with a powerful cipher, making all information utterly inaccessible … unless you could unlock the key to the secret code behind the German’s powerful Enigma machine. 

In the dead of night, a truck arrives in Slaughterville, a small town curiously named after its windowless slaughterhouse. Seven mysterious kids with suitcases step out of the vehicle and into an abandoned home on a dead-end street, looking over their shoulders to make sure they aren't noticed. But Ravani Foster covertly witnesses their arrival from his bedroom window. Timid and lonely, Ravani is eager to learn everything he can about his new neighbors: What secrets are they hiding? And most mysterious of all...where are the adults?

Hazel Rothbury is traveling all alone from her home in England aboard the celebrated ship Titanic. Following the untimely death of her father, Hazel’s mother is sending her to the US to work in a factory, so that she might send money back home to help her family make ends meet. But Hazel harbors a secret dream: She wants to be a journalist, and she just knows that if she can write and sell a story about the Titanic's maiden voyage, she could earn enough money to support her family and not have to go to a sweatshop.

It is 1940 and William, 12, Edmund, 11, and Anna, nine, aren't terribly upset by the death of the not-so-grandmotherly grandmother who has taken care of them since their parents died. But the children do need a guardian, and in the dark days of World War II London, those are in short supply, especially if they hope to stay together. Could the mass wartime evacuation of children from London to the countryside be the answer? 

When Mac first opens his classroom copy of Jane Yolen's The Devil’s Arithmetic and finds some words blacked out, he thinks it must be a mistake. But then when he and his friends discover what the missing words are, he's outraged. Someone in his school is trying to prevent kids from reading the full story. But who? Even though his unreliable dad tells him to not get so emotional about a book (or anything else), Mac has been raised by his mom and grandad to call out things that are wrong. He and his friends head to the principal's office to protest the censorship.

Under the cover of night, 12-year-old Homer flees Southerland Plantation with his little sister Ada, unwillingly leaving their beloved mother behind. Much as he adores her and fears for her life, Homer knows there’s no turning back, not with the overseer on their trail. Through tangled vines, secret doorways, and over a sky bridge, the two find a secret community called Freewater, deep in the swamp.

For as long as Ryanna Stuart can remember, her summers have been spent with her father and his new wife. Just the three of them, structured, planned, and quiet. But this summer is different. This summer, she’s received a letter from her grandparents—grandparents neither she nor her dad have spoken to since her mom’s death—inviting her to stay with them at an old summer camp in the Poconos.

Thirteen-year-old Matthew is miserable. His journalist dad is stuck overseas indefinitely, and his mom has moved in his one-hundred-year-old great-grandmother to ride out the pandemic, adding to his stress and isolation. But when Matthew finds a tattered black-and-white photo in his great-grandmother’s belongings, he discovers a clue to a hidden chapter of her past, one that will lead to a life-shattering family secret.

Since the day he hatched, Owl dreamed of becoming a real knight. He may not be the biggest or the strongest, but his sharp nocturnal instincts can help protect the castle, especially since many knights have recently gone missing. While holding guard during Knight Night Watch, Owl is faced with the ultimate trial—a frightening intruder. It’s a daunting duel by any measure. But what Owl lacks in size, he makes up for in good ideas.

Twelve-year-old Dory Byrne lives with her brothers on New York City's Lower East Side, waiting impatiently through the darkest hours of World War II for her pop to come home from fighting Hitler. Legally speaking, Dory's brother, Fish, isn't old enough to be in charge of Dory and her younger brother, Pike, but the neighborhood knows the score and, like Pop always says, "the neighborhood will give you what you need." There's the lady from the bakery, who saves them leftover crullers. The kind landlord who checks in on them.

Before Jake’s grandfather died, he was on the trail of a centuries-old mystery. And he has entrusted that mystery to Jake, leaving behind a set of hidden codes, riddles, maps, and other clues that lead Jake and his friends on a scavenger hunt into the heart of Colorado’s wild and rugged Rocky Mountain National Park.

Elliott has been struggling since his closest friend moved away, and he’s not too sure where he fits into his own family, especially since his newly remarried dad and stepmom are expecting a baby. His grades aren’t too great, he’s always forgetting things and he doesn’t really like sports. All together, the result is someone the complete opposite of his dad - a fact they’re both very aware of. Elliott’s only solace is cooking, where he can control the outcome, testing exciting recipes and watching his favourite cooking shows.

Simon O'Keeffe's biggest claim to fame should be the time his dad accidentally gave a squirrel a holy sacrament. Or maybe the alpaca disaster that went viral on YouTube. But the story the whole world wants to tell about Simon is the one he'd do anything to forget: the story in which he's the only kid in his class who survived a school shooting. Two years after the infamous event, twelve-year-old Simon and his family move to the National Quiet Zone—the only place in America where the internet is banned.

Clay has had his fill of home life. A global plague has brought the world to a screeching halt, and with little to look forward to but a summer of video-calling friends, vying with annoying sisters for the family computer, and tuning out his parents’ financial worries, he’s only too happy to retreat to the woods. From the moment the elegant little dog with the ornate collar appears like an apparition among the trees, Clay sees something uncanny in her.