The Blood of Olympus
Rick Riordan
The Heroes of Olympus (5)
Unlocked
Shannon Messenger
Keeper of the Lost Cities (8.5)
The Tyrant's Tomb
The Trials of Apollo (4)
The Last Olympian
Percy Jackson and the Olympians (5)
How to Break a Dragon's Heart
Cressida Cowell
How to Train Your Dragon (8)
How to Speak Dragonese
How to Train Your Dragon (3)
How to Seize a Dragon's Jewel
How to Train Your Dragon (10)
How To Train Your Dragon: How to Betray a Dragon's Hero: Book ...
How to Train Your Dragon (11)