The Sword of Summer
Rick Riordan
Magnus Chase and the Gods of Asgard (1)
Nightfall
Shannon Messenger
Keeper of the Lost Cities (6)
How to Twist a Dragon's Tale
Cressida Cowell
How to Train Your Dragon (5)
The Last Olympian
Percy Jackson and the Olympians (5)
How to Be a Pirate
How to Train Your Dragon (2)