Turtle is scavenging a drowned town when she saves a stranger’s life. There’s something special about Kai—an attraction she’s never felt before. She would do anything to see him again. But Turtle can never truly be with Kai, because Kai is Normal, and Turtle is one of the Mer, kids whose genes were illegally hacked before birth and who now have working gills as well as lungs. Turtle lives on an old cruise ship with the other Mer in order to be close to the water she needs to survive.

Death waits for Estrella (Noche) Villanueva. In her human form, she is a lonely science girl grieving the tragic accidental drowning of her girlfriend, Dante Fuentes. At night, she is a Lechuza who visits her dead girlfriend at the lake, desperate for more time with her. The longer Dante’s soul roams the earth, the more likely it is that she will fade into the unknown, lost forever, but Noche cannot let go . . . That’s when a new kid comes to town, Jax, another science nerd like Noche. They connect in a way she can’t ignore, seemingly pulled together by an invisible thread.

In 1940s Germany, Sophie is excited to discover a message waiting for her in the Bridegroom's Oak from a mysterious suitor. Meanwhile, her best friend, Hanna, is sending messages too—but not to find love. As World War II unfolds in their small town of Kleinwald, the oak may hold the key to resistance against the Nazis.

Seven years ago, Maeve Abenthy lost everything: her world, her father, even her name. Desperate to escape the stain of her father’s crimes, she lives under a fake name, never staying in one place long enough to put down roots. Then she receives a mysterious letter with four impossible words: Your father was innocent. To uncover the truth, she poses as an apprentice for the Otherwhere Post, where she’ll be trained in the art of scriptomancy—the dangerous magic that allows couriers to enchant letters and deliver them to other worlds.

Welcome to The Thrashers, the exclusive friend group of New Helvetia High. They are everything you want to be and everyone wants to be them. Then there’s Jodi Dillion, the odd one out. The others—Julian, Lucy, Paige, and the infamous Zack Thrasher—are rich, sophisticated, and love being the center of attention; Jodi usually feels out of place. But Zack’s been her best friend since elementary school, so he says she’s in—and no one turns down the chance to be part of their group. Like Emily Mills. She wanted to be a Thrasher. More than anything.