Battle Of The Labyrinth Bk4 - By Rick Riordan

After Blowing Up Yet Another School, Percy Is Forced To Flee To Camp Half Blood, Where He Finds All Is Not Well. A Dangerous Enemy, Intent On Destroying The Secret Training Camp For Young Demi-Gods, Has Found A Way In Through An Ancient Labyrinth. Percy And His Friends Must Unravel The Mysteries Of The Maze To Stop This Attack.