The Lightning Thief
Rick Riordan
Percy Jackson and the Olympians (1)
Percy Jackson's Greek Heroes
How to Ride a Dragon's Storm
Cressida Cowell
How to Train Your Dragon (7)
Eldest
Christopher Paolini
The Inheritance Cycle (2)
The Son of Neptune
The Heroes of Olympus (2)
The Serpent's Shadow
The Kane Chronicles (3)
The Mark of Athena
The Heroes of Olympus (4)
The Lost Hero
The Heroes of Olympus (1)
The Demigod Files
Percy Jackson and the Olympians (4.5)