Awakening the Fire (Guardian Witch #1) by Ally Shields
New guardian Ari Calin thought she had Olde Town under control until an exotic designer drug surfaced, a new werewolf pack hit town, and Otherworlders started fighting and dying. It wasn’t as if she could zap the trouble away. She had to play by human rules while working with a human partner. And then there was oh-so-charming vampire Andreas. Was he part of the solution or the problem? Together they had to find a way to stop the violence before a supernatural war destroyed them all.