The Resistance: The Fourth Book of the Fey    by Kristine Kathryn Rusch
Price: $5.99 USD. 164200 words. Published by WMG Publishing  on January 2, 2012. .
A Ruthless Warrior. A Brilliant Tactician. One Family. Opposite Sides. The Black King of the Fey, Rugad, has conquered Blue Isle’s capitol city. He thinks he’s conquered the Isle itself, even though he can’t find its royal family. That family has retreated and will regroup and attack again, this time with a new weapon, one that can change everything.