From the creator of PERCY JACKSON, bestselling author Rick Riordan, comes a brand-new adventure, inspired by Jules Verne's Twenty Thousand Leagues Under the Sea.

Ana Dakkar is a freshman at Harding-Pencroft Academy, a five-year high school that graduates the best marine scientists, naval warriors, navigators, and underwater explorers in the world. Ana's parents died while on a scientific expedition two years ago, and the only family's she's got left is her older brother, Dev, also a ...