Titan's Curse, the (Percy Jackson and the Olympians, Book 3)
Rick Riordan
Percy Jackson and the Olympians (3)
The Sea of Monsters
Percy Jackson and the Olympians (2)
The Lost Hero
The Heroes of Olympus (1)
The Last Olympian
Percy Jackson and the Olympians (5)
The Battle of the Labyrinth
Percy Jackson and the Olympians (4)