The Mark of Athena
Rick Riordan
The Heroes of Olympus (4)
How to Break a Dragon's Heart
Cressida Cowell
How to Train Your Dragon (8)
Exile
Shannon Messenger
Keeper of the Lost Cities (2)
The Sword of Summer
Magnus Chase and the Gods of Asgard (1)
Camp Jupiter Classified
The Trials of Apollo (4.50)
Camp Half-Blood Confidential: Your Real Guide to the Demigod ...
The Burning Maze
The Trials of Apollo (3)
The Blood of Olympus
The Heroes of Olympus (5)
The Battle of the Labyrinth
Percy Jackson and the Olympians (4)
9 from the Nine Worlds
Magnus Chase and the Gods of Asgard (5)