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.

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.

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.

Fern’s lived at the Ranch, an off-the-grid, sustainable community in upstate New York, since she was six. The work is hard, but Fern admires the Ranch's leader, Dr. Ben. So when Fern’s mother sneaks them away in the middle of the night and says Dr. Ben is dangerous, Fern doesn't believe it. She wants desperately to go back, but her mom just keeps driving. Suddenly thrust into the treacherous, toxic, outside world, Fern thinks only about how to get home again.

Twenty-four months ago: Neon gets chased by a dog all around the parking lot of a church. Not his finest moment. And definitely one he would have loved to forget if it weren’t for the dog’s owner: Aria. Dressed in sweats, a t-shirt, hair in a ponytail. Aria. Way more than fine. Twenty-four weeks ago: Neon’s dad insists on talking to him about tenderness and intimacy. Neon and Aria are definitely in love, and while they haven’t taken that next big step…yet, they’ve starting talking about…that.

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?

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.

Andrew’s just trying to make it through Picture Day, which is easier said than done when it seems like the whole world is out to get him—from a bully to a science experiment gone wrong to a someone else’s juice snot (don’t ask). But as Andrew goes through the school day, and as one thing after another goes wrong, that little kernel of worry in his stomach is getting hotter and hotter, until it threatens to pop and turn into a public panic attack, his worst fear. He tries to keep his anxiety at bay, but the news that his grandmother with Alzheimer’s is missing is too much.

Maggie's world is turned upside down when she learns that her father, whom she admires, has a second daughter, Callie, whom no one knew existed. But she won't let a new family member get in the way of her summer plans with her best friend, Daija. They're determined to make tons of money braiding hair for kids around the neighborhood.

When Brianna Justice's hero, the famous celebrity Chef Miss Delicious, speaks at her school and traces her own success back to being president of her fifth-grade class, Brianna determines she must do the same. She just knows that becoming president of her class is the first step toward her own cupcake-baking empire! But when new student Jasmine Moon announces she is also running for president, Brianna learns that she may have more competition than she expected.