How to Seize a Dragon's Jewel
Cressida Cowell
How to Train Your Dragon (10)
Keeper of the Lost Cities
Shannon Messenger
Keeper of the Lost Cities (1)
Wrath of the Triple Goddess
Rick Riordan
Percy Jackson and the Olympians (7)
Stellarlune
Keeper of the Lost Cities (9)
The Son of Neptune
The Heroes of Olympus (2)
Percy Jackson's Greek Gods
Rick Riordan & John Rocco
The Burning Maze
The Trials of Apollo (3)