The Blood of Olympus
Rick Riordan
The Heroes of Olympus (5)
How to Train Your Viking
Cressida Cowell
How to Train Your Dragon (1.5)
Brisingr
Christopher Paolini
The Inheritance Cycle (3)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)
How to Break a Dragon's Heart
How to Train Your Dragon (8)
The Chalice of the Gods
Percy Jackson and the Olympians (6)