From the bestselling author of PERCY JACKSON, Rick Riordan.Ana Dakkar is a freshman at Harding-Pencroft Academy, renowned for producing the best marine scientists, naval warriors and underwater explorers in the world.But, unlike the other students, the water is personal for Ana. After losing both of her parents on a scientific expedition, her older brother Dev is now the only family she has. Ready to prove herself, Ana and her class are off to a top-secret weekend trial at sea. But, on the bus ...