Inquisitor: Witch & Wolf #1

When Allison is asked to play Cinderella-turned-Fianceé at a Halloween ball, the last thing she expected was to be accused of murder. She has to find the killer or she'll be put to death for the crimes she didn't commit. To make matters worse, the victims are all werewolves. On the short list of potential victims, Allison has to act fast, or the killer will have one more body to add to his little black book of corpses.