The Battle of the Labyrinth
Rick Riordan
Percy Jackson and the Olympians (4)
The Letters of J. R. R.Tolkien
J. R. R. Tolkien & Christopher Tolkien & Humphrey Carpenter
Tales From the Perilous Realm
Alan Lee
The Hidden Oracle
The Trials of Apollo (1)
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)