Dark Fire
Chris D'Lacey
The Staff of Serapis
Rick Riordan
Demigods and Magicians (1)
The Battle of the Labyrinth
Percy Jackson and the Olympians (4)
The Hidden Oracle
The Trials of Apollo (1)
The Son of Neptune
The Heroes of Olympus (2)
Hotel Valhalla Guide to the Norse Worlds: Your Introduction ...
Magnus Chase and the Gods of Asgard (4)