How to Ride a Dragon's Storm
Cressida Cowell
How to Train Your Dragon (7)
The Hidden Oracle
Rick Riordan
The Trials of Apollo (1)
The Titan's Curse
Percy Jackson and the Olympians (3)
Unlocked
Shannon Messenger
Keeper of the Lost Cities (8.5)
The Blood of Olympus
The Heroes of Olympus (5)
The House of Hades
The Heroes of Olympus (1)