Waking the Witch by Kelley Armstrong
Columbus is a small, fading town, untouched by the twenty-first century. But when three young women are found dead - victims of what appear to be ritual murders - things start to get very dark, and very dangerous ...Private investigator Savannah Levine can handle 'dark and dangerous'. As the daughter of a black witch, she has a lot of power running through her veins, and she's not afraid to use it. But her arrival in Columbus has not gone unnoticed. Savannah may think she's tracking down a murderer, but could she be the killer's next target? Of course she could always ask her old friend (and half-demon) Adam Vasic for back up. But Savannah has her own - very personal - reasons for keeping Adam well away from Columbus. And in any case, she can rely on her own powers. Can't she ...?