How to Train Your Viking
Cressida Cowell
How to Train Your Dragon (1.5)
Flashback
Shannon Messenger
Keeper of the Lost Cities (7)
The Titan's Curse
Rick Riordan
Percy Jackson and the Olympians (3)
Percy Jackson's Greek Heroes
How to Speak Dragonese
How to Train Your Dragon (3)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)
The Red Pyramid
The Kane Chronicles (1)