The Sword of Summer
Rick Riordan
Magnus Chase and the Gods of Asgard (1)
How to Speak Dragonese
Cressida Cowell
How to Train Your Dragon (3)
How to Ride a Dragon's Storm
How to Train Your Dragon (7)
The Dark Prophecy
The Trials of Apollo (2)
The Sea of Monsters
Percy Jackson and the Olympians (2)
The Lightning Thief
Percy Jackson and the Olympians (1)