9 from the Nine Worlds
Rick Riordan
Magnus Chase and the Gods of Asgard (5)
The Hobbit
J. R. R. Tolkien
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)
The Titan's Curse
Percy Jackson and the Olympians (3)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)