The Staff of Serapis
Rick Riordan
Demigods and Magicians (1)
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)
The Hidden Oracle
The Trials of Apollo (1)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)
The Demigod Files
Percy Jackson and the Olympians (4.50)
The Lost Hero
The Heroes of Olympus (1)
The Son of Neptune
The Heroes of Olympus (2)
The Mark of Athena
The Heroes of Olympus (4)
The Serpent's Shadow
The Kane Chronicles (3)