The Time Machine
H. G. Wells
The Battle of the Labyrinth
Rick Riordan
Percy Jackson and the Olympians (4)
Jade City
Fonda Lee
The Green Bone Saga (1)
The Last Olympian
Percy Jackson and the Olympians (5)
Percy Jackson's Greek Gods
Rick Riordan & John Rocco
Percy Jackson's Companion Books (3)
The Dark Prophecy
The Trials of Apollo (2)