Defiance by Lili St. Crow
Release Date: April 19th, 2011
Now that sixteen-year-old Dru's worst fears have come true and Sergej has kidnapped her best friend Graves, she'll have to go on a suicidal rescue mission to bring him back in one piece.
That is, if she can put all of Christophe's training to good use, defeat her mother's traitor, Anna, once and for all, and manage to survive another day...
I am really loving this series! If you haven't started it yet, check out Strange Angels by Lili St. Crow. It is fantastic!
Pre-order it here: Amazon