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.

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.

Seventh grade begins, and Kareem’s already fumbled it. His best friend moved away, he messed up his tryout for the football team, and because of his heritage, he was voluntold to show the new kid—a Syrian refugee with a thick and embarrassing accent—around school. Just when Kareem thinks his middle school life has imploded, the hotshot QB promises to get Kareem another tryout for the squad. There’s a catch: to secure that chance, Kareem must do something he knows is wrong.

Jake volunteers at a nursing home because he likes helping people. He likes skating and singing, playing Bingo and Name That Tune, and reading mysteries and comics aloud to his teachers. He also likes avoiding people his own age . . . and the cruelty of mirrors . . . and food. Jake has read about kids like him in books—the weird one, the outsider—and would do anything not to be that kid, including shrink himself down to nothing. But the less he eats, the bigger he feels. How long can Jake punish himself before he truly disappears?

Twelve-year-old Sarah Greene wants nothing more from her seventh-grade year than to beat the hardest escape room left in her town with her best friends, West, and Hannah. But when a foreclosure notice shows up on Sarah's front door, everything changes. Since her father became ill two years ago, things have been bad, but not lose your house bad . . . until now.

It's August 1999. For twelve-year-old Michael Rosario, life at Fox Run Apartments in Red Knot, Delaware, is as ordinary as ever—except for the looming Y2K crisis and his overwhelming crush on his sixteen-year-old babysitter, Gibby. But when a disoriented teenage boy named Ridge appears out of nowhere, Michael discovers there is more to life than stockpiling supplies and pining over Gibby.

Helen and Gracie are pranking their way through middle school when a stinky stunt lands them in the front office—again. Because nothing else has curbed their chaos, the principal orders the best friends to do the unthinkable: care about something. So they join the school's Community Action Club with plans to do as little as humanly possible. But when Helen is caught unprepared by an early period and bleeds through her pants— they were gold lamé!—the girls take over the club's campaign for maxi pads in bathrooms for all students who menstruate.

Seventeen-year-old Aimee Roh has Sensory Time Warp Syndrome, a rare condition that causes her to time travel to a moment in her life when she smells something linked to that memory. Her dad is convinced she’ll simply grow out of it if she tries hard enough, but Aimee’s fear of vanishing at random has kept her from living a normal life. When Aimee disappears for nine hours into a memory of her estranged mom—a moment Aimee has never remembered before—she becomes distraught.

Some would call River Rydell a ‘chosen one’: born with the ability to see monsters and travel to a terrifying spirit world called The Otherwoods, they have all the makings of a hero. But River just calls themself unlucky. After all, it’s not like anyone actually believes River can see these things—or that anyone even believes monsters exist in the first place. So the way River sees it, it’s better to keep their head down and ignore anything Otherwoods related. But The Otherwoods won’t be ignored any longer.

Isaiah ""Ice"" Abernathy has always worshiped his older brother, Seth. For years they’ve been not just brothers but best friends—and as Seth starts his senior year, Ice is eager to spend as much time with his brother as he can, making memories before Seth goes to college.