The Son of Neptune
Rick Riordan
The Heroes of Olympus (2)
Hero's Guide to Deadly Dragons
Cressida Cowell
How to Train Your Dragon (6)
The Crown of Ptolemy
Demigods and Magicians (3)
The Mark of Athena
The Heroes of Olympus (4)
How to Train Your Dragon
How to Train Your Dragon (1)
How to Be a Pirate
How to Train Your Dragon (2)
How to Speak Dragonese
How to Train Your Dragon (3)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)