Call of Darkness by Jessica Caspian
On the surface, Erica appears to be a normal young woman, attending college classes and meeting up with her few close friends. At night she is found stalking through shadows dressed all in black, taking out vampires and werewolves with her blades. Since losing her parents to an attack by vampires wanting to erase their family legacy from the world, Erica has taken up their vampire hunting business with a vengeance. She is an alpha girl and a force to be reckoned with. At least, that was what she thought until she met Dallas.