Inheritance
Christopher Paolini
The Inheritance Cycle (4)
The Fork, the Witch, and the Worm
Christopher Paolini & Angela Paolini
The Inheritance Cycle (4.5)
The Battle of the Labyrinth
Rick Riordan
Percy Jackson and the Olympians (4)
The Son of Neptune
The Heroes of Olympus (2)
Percy Jackson's Greek Heroes