How to Break a Dragon's Heart
Cressida Cowell
How to Train Your Dragon (8)
How to Train Your Viking
How to Train Your Dragon (1.5)
The Demigod Diaries
Rick Riordan
The Heroes of Olympus (0)
Wrath of the Triple Goddess
Percy Jackson and the Olympians (7)
The Wyrm King
Tony DiTerlizzi & Holly Black