The Sword of Summer
Rick Riordan
Magnus Chase and the Gods of Asgard (1)
The Mark of Athena
The Heroes of Olympus (4)
The Lost Hero
The Heroes of Olympus (1)
How to Train Your Viking
Cressida Cowell
How to Train Your Dragon (1.50)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)