Fool Moon (Jim Butcher)

Harry Dresden is a wizard in contemporary Chicago, working with the police to solve crimes that have occult elements. In this story, people have been torn apart by something with monstrous claws and teeth right around the full moon, and Harry has to figure out how to stop it. There are multiple kinds of werewolves in this story, some good, some bad, some in between, but the real complication comes as Harry tries to sort out his relationships with three women: his young apprentice, a smart and lovely reporter, and a tough, no-nonsense detective. I love this series, because the stories are engaging and Harry is someone I can really like.