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. In a race against deadly enemies, Ana will make amazing friends and astounding discoveries about her heritage as she puts her leadership skills to the test for the first time.