The Blood of Olympus
Rick Riordan
The Heroes of Olympus (5)
The Demigod Files
Percy Jackson and the Olympians (4.5)
How to Steal a Dragon's Sword
Cressida Cowell
How to Train Your Dragon (9)
How to Cheat a Dragon's Curse
How to Train Your Dragon (4)
The Tyrant's Tomb
The Trials of Apollo (4)