Red-Headed Stepchild by Jaye Wells - Half-vampire, half-mage Sabina Kane is an assassin for the Dominae, the three women who rule over vampires. The result of a forbidden love affair, Sabina always tries to impress her grandmother Lavinia, the Alpha of the Dominae, who constantly reminds her of the circumstances of her birth. When the Dominae set Sabina the assignment of infiltrating into a cult trying to reunite all the dark races - vampires, mages, and fae - spy on the leader, and eventually kill them, Sabina gets a lot more than she bargained for. She's stalked by a mage, ends up with a demon for a room mate, and finds out some family secrets. The more involved she gets, the more dangerous things get, and she has to decide just who's side she's on.
