The Staff of Serapis
Rick Riordan
Demigods and Magicians (1)
The Chalice of the Gods
Percy Jackson and the Olympians (6)
The Crown of Ptolemy
Demigods and Magicians (3)
The Silmarillion
J.R.R. Tolkien
The Hidden Oracle
The Trials of Apollo (1)
The Dark Prophecy
The Trials of Apollo (2)
The Burning Maze
The Trials of Apollo (3)
The Tyrant's Tomb
The Trials of Apollo (4)
Camp Jupiter Classified
The Trials of Apollo (4.5)
The Tower of Nero
The Trials of Apollo (5)