The Chalice of the Gods
Rick Riordan
Percy Jackson and the Olympians (6)
The Son of Sobek
Demigods and Magicians (1)
The Demigod Diaries
The Heroes of Olympus (0)
How to Train Your Viking
Cressida Cowell
How to Train Your Dragon (1.5)
The Son of Neptune
The Heroes of Olympus (2)