The Staff of Serapis
Rick Riordan
Demigods and Magicians (1)
Dark Fire
Chris D'Lacey
The Demigod Files
Percy Jackson and the Olympians (4.5)
Flashback
Shannon Messenger
Keeper of the Lost Cities (7)
The Lost Hero
The Heroes of Olympus (1)
The Mark of Athena
The Heroes of Olympus (4)
The Serpent's Shadow
The Kane Chronicles (3)
The Son of Neptune
The Heroes of Olympus (2)