Camp Jupiter Classified
Rick Riordan
The Trials of Apollo (4.5)
The Hidden Oracle
The Trials of Apollo (1)
The Chalice of the Gods
Percy Jackson and the Olympians (6)
How to Seize a Dragon's Jewel
Cressida Cowell
How to Train Your Dragon (10)
The Son of Sobek
Demigods and Magicians (1)
The Staff of Serapis
The Crown of Ptolemy
Demigods and Magicians (3)