Consuming the Darkness - Darkness, #7

In Jacob's Cove, where death is as common as apple pie, a serial murderer is a first. Lieutenant Sienna Storm, the town's newly minted homicide detective, is eager to prove she's up to the job of tracking down the demon who rips out his victims' still-beating hearts. Even if it means using her abilities.  Detective Nathan Powers lost his partner to the aptly named Heartless Killer, and the trail of bodies leads him to Jacob's Cove, a strange world populated with bloodthirsty demons and run by a vampire.
Still, the leggy blonde, Sienna, is a pleasant distraction. Until he discovers she's after the same killer-and she's not sharing. On the hunt, the more they cross paths, the harder it is to stay apart. Together they discover not only clues, but a searing desire, one that may be their downfall when the killer targets Nathan, and Sienna risks everything to get him back.