Midnight Predator by Amelia Atwater-Rhodes

well its like a horror/ romance kinda of book its really good its about this bounty hunter she hunts vampires and gets hired to kill one of the top and to get into the building she has to become a slave and she has to act so no one knows she is untamed but her old master finds her and wants her back and the top one she isn't supposed to kill falls for her anyway i'm not gonna tell you all of it cause if i do continue i might tell you the ending