Ghost War
Michael A. Stackpole
The Bramble Bush, the Destroyers, the Highest Treason, a Spaceship ...
Randall Garrett
The Titan's Curse
Rick Riordan
Percy Jackson and the Olympians (3)
The Scarab Path
Adrian Tchaikovsky
Shadows of the Apt (5)
Trickster's Choice
Tamora Pierce
Daughter of the Lioness (1)