Unfinished Tales
J. R. R. Tolkien
The Lightning Thief
Rick Riordan
Percy Jackson and the Olympians (1)
The Sea of Monsters
Percy Jackson and the Olympians (2)
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)