The House of Hades
Rick Riordan
The Heroes of Olympus (1)
The Mark of Athena
The Heroes of Olympus (4)
How to Train Your Dragon: 12
Cressida Cowell
How to Train Your Dragon (12)
The Last Olympian
Percy Jackson and the Olympians (5)
The Serpent's Shadow
The Kane Chronicles (3)
The Son of Neptune
The Heroes of Olympus (2)
The Lost Hero
The Demigod Files
Percy Jackson and the Olympians (4.50)