The second book in the New York Times best-selling saga with a cover image and an 8-page photo insert from the Disney+ series! When Thalia's tree is mysteriously poisoned, the magical borders of Camp Half-Blood begin to fail. Now Percy and his friends have just days to find the only magic item powerful to save the camp before it is overrun by monsters. The catch: they must sail into the Sea of Monsters to find it. Along the way, Percy must stage a daring rescue operation to save his old friend Grover, and he learns a terrible secret about his own family, which makes him question whether being the son of Poseidon is an honor or simply a cruel joke. Whether you are new to the world of Percy Jackson or a longtime fan, this tie-in paperback edition with full-color photos from the Disney+ series is a must-have for your library.