The Sword of Summer
Rick Riordan
Magnus Chase and the Gods of Asgard (1)
Percy Jackson's Greek Heroes
The Battle of the Labyrinth
Percy Jackson and the Olympians (4)
The Demigod Files
Percy Jackson and the Olympians (4.5)
How to Cheat a Dragon's Curse
Cressida Cowell
How to Train Your Dragon (4)