Unlocked
Shannon Messenger
Keeper of the Lost Cities (8.5)
The Burning Maze
Rick Riordan
The Trials of Apollo (3)
The Fire Eternal
Chris D'Lacey
How to Break a Dragon's Heart
Cressida Cowell
How to Train Your Dragon (8)
The Battle of the Labyrinth
Percy Jackson and the Olympians (4)
The Demigod Files
Percy Jackson and the Olympians (4.5)
The Demigod Diaries
The Heroes of Olympus (0)
The Lost Hero
The Heroes of Olympus (1)
The Red Pyramid
The Kane Chronicles (1)