Camp Jupiter Classified
Rick Riordan
The Trials of Apollo (4.5)
The Chalice of the Gods
Percy Jackson and the Olympians (6)
The Children of Húrin with illustrations by Alan Lee
J. R. R. Tolkien & Christopher Tolkien & Alan Lee
Percy Jackson's Greek Gods
Rick Riordan & John Rocco
Hotel Valhalla Guide to the Norse Worlds: Your Introduction ...
Magnus Chase and the Gods of Asgard (4)
The Son of Neptune
The Heroes of Olympus (2)