The Mark of Athena
Rick Riordan
The Heroes of Olympus (4)
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)
The Demigod Files
Percy Jackson and the Olympians (4.5)
The Wrath of Mulgarath
Tony DiTerlizzi & Holly Black
The Spiderwick Chronicles (5)
The Chalice of the Gods
Percy Jackson and the Olympians (6)
How to Break a Dragon's Heart
How to Train Your Dragon (8)