How To Train Your Dragon: How to Betray a Dragon's Hero: Book ...
Cressida Cowell
How to Train Your Dragon (11)
The Tyrant's Tomb
Rick Riordan
The Trials of Apollo (4)
Wrath of the Triple Goddess
Percy Jackson and the Olympians (7)
Nightfall
Shannon Messenger
Keeper of the Lost Cities (6)
The Son of Neptune
The Heroes of Olympus (2)