Summer, 1940. Nineteen-year-old Jakob Novis and his quirky younger sister Lizzie share a love of riddles and puzzles. And now they’re living inside of one. The quarrelsome siblings find themselves amidst one of the greatest secrets of World War II—Britain’s eccentric codebreaking factory at Bletchley Park. As Jakob joins Bletchley’s top minds to crack the Nazi's Enigma cipher, fourteen-year-old Lizzie embarks on a mission to solve the mysterious disappearance of their mother.

The wilderness is in Jenna’s blood. Her Pap was the first Black park ranger at Sturbridge Reservation, and she practically knows the Owlet Survival Handbook by heart. But she’s never encountered a creature like the one that took her best friend Reese. Her parents don’t believe her; the police are worthless, following the wrong leads; and the media isn’t connecting the dots between Reese’s disappearance and a string of other attacks. Determined to save her friend, Jenna joins a new local scout troop, and ventures back into the woods.

When eleven-year-old Hank’s mom doesn’t come home, he takes care of his toddler sister, Boo, like he always does. But it’s been a week now. They are out of food and mom has never stayed away this long… Hank knows he needs help, so he and Boo seek out the stranger listed as their emergency contact. But asking for help has consequences. It means social workers, and a new school, and having to answer questions about his mom that he's been trying to keep secret. And if they can't find his mom soon, Hank and Boo may end up in different foster homes—he could lose everything.

Weatherby is a fish out of water. When she lands a scholarship to the prestigious Boston School, she's excited to be in the same world as her dad, whom she's never met, and make real friends. But Weatherby has a secret she'll risk everything to protect, one that could destroy her new life. Every member of Jack's wealthy and privileged family has made their mark at the Boston School. Everyone, that is, except for Jack, who is entirely mediocre. He's desperate to prove his worth to his influential father. But Jack has a secret of his own . . . one with the power to ruin everything.

Ever since her dad died, 11-year-old Jerry Blum and her mom have bounced around dead-end towns, staying in a series of rundown motels where her mother picks up housekeeping work and Jerry can get around in her wheelchair. But the Slumbering Giant motel is different. Lights blink on and off in the surrounding trees, a mysterious radio station plays only at midnight, and people disappear into the woods, never to been seen again. Not to mention that Jerry’s mom keeps vanishing to do “special work” that she refuses to discuss. When her mother doesn’t come home one morning, Jerry acts.