Soul taken / Patricia Briggs.

Mercy Thompson, car mechanic and shapeshifter, must face her greatest fears in this chilling entry in the #1 New York Times bestselling series. The vampire Wulfe is missing. Since he's deadly, possibly insane, and his current idea of "fun" is stalking Mercy, some may see it as no great loss. But when he disappears, the Tri-Cities pack is blamed. The Mistress of the vampire seethe informs Mercy that the pack must produce Wulfe to prove their innocence, or the loose alliance between the local vampires and werewolves is over. So Mercy goes out to find her stalker-and discovers that it's not just Wulfe who's disappeared. Someone is taking people from locked rooms, from the aisles of stores, and even from crowded parties. And these are not simply ordinary people but supernatural beings. Most of them are powerless loners who quietly moved to the Tri-Cities, hoping that the safety promised by Mercy and Adam's pack would extend to them as well. Who is taking them? As Mercy investigates, she hears of the legend of the Harvester, who travels by less trodden paths and reaps ripe souls with a great black scythe.