The Battle of the Labyrinth
Rick Riordan
Percy Jackson and the Olympians (4)
The Chalice of the Gods
Percy Jackson and the Olympians (6)
Legacy
Shannon Messenger
Keeper of the Lost Cities (8)
The Demigod Files
Percy Jackson and the Olympians (4.50)
The Demigod Diaries
The Heroes of Olympus (0.0)