The Battle of the Labyrinth

The fourth book in the Percy Jackson and the Olympians series, this book is all about Percy, Annabeth and Grovers adventures and experiences within the fabled Labyrinth from the Ancient Greek myths. Luke, the  demigod who has turned against his father and Olympus in favor of the evil Titans, has been trying to use the Labyrinth to gain access into the well protected Camp Half Blood. Once in the Labyrinth, the kids soon discover secrets, facts and betrayals between and about one another. If they survive the Labyrinth, they'll save the gods and the world... but will they be able to save one another?