Semi-Charmed

Psychic and paranormal PI Harper Hall isn't that surprised when her business partner skips town. Really, she can't help but feel that it's her own fault for trusting a guy named Romeo in the first place.
But if Harper wants to consult for the police on a high-profile case, she'll need a new partner—preferably one with some supernatural skills of his own. Enter Noah Riddick, a slayer left jobless by the legalization of vampirism. Riddick's dark secrets and shady past have forced him into exile from human society—an exile he was completely comfortable with until gorgeous and exasperating Harper waltzed into his life.
Fighting vampires, making immortal enemies, engaging in semi-sadistic interrogation techniques, and staging daring rescues—it's all in a day's work for this paranormal odd couple. But falling in love? Well, that's a little trickier. Even for the semi-charmed Harper Hall.