The Battle of the Labyrinth
Rick Riordan
Percy Jackson and the Olympians (4)
The Hierophant's Daughter
M. F. Sullivan
The Disgraced Martyr Trilogy (1)
Merlin
Stephen R. Lawhead
Pendragon Cycle (2)
Alien Separation
Gini Koch
Alien Novels (11)
The Gravity Between Us
Kristen Zimmer