The Dresden Files-1

Set in the city of modern Chicago only with a twist: Magic exists and Harry Dresden is the only thing standing in the way of what goes bump in the night and Chicago's unassuming citizens. Toss in demons, sorcerers, angry cops, paladins, werewolves, and a mob boss trying to muscle in on every piece of action he can get, and you end up with with a lot of noses being tweaked the wrong way. And in the middle of it all, Dresden, trying to keep the whole kettle from blowing over.