Synopsis (from rickriordan.com): 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 a curse.
Age: 7 or 8, but I would like to add that parents may want to read the books with their younger children and make it clear that the Greek gods aren’t real.
Inappropriate content: none
My thoughts: I love this book almost as much as The Lightning Thief! Although, in the scope of all five Percy Jackson books, I think this is my least favorite book.
Sequels: The Titan’s Curse; The Battle of the Labyrinth; and The Last Olympian.