Jim Butcher not only rules the Urban Fantasy world (in my opinion), but he also rules in Science Fiction & Fantasy with his Codex Alera series. Seriously, I didn’t even know it was the same author. I highly suggest reading both – you will get a true idea of what is means to be an amazing author.
Here is an excerpt from Wikepdia about the Dresden Files:
In the world of The Dresden Files, magic is real, along with ghouls, vampires, demons, spirits, faeries, werewolves, and other mythical monsters. Harry Dresden works to protect the general public, who are ignorant of magic and the dark forces conspiring against them. This makes it difficult for Harry to get by as a working wizard and private eye. The Chicago PD‘s Special Investigation unit, when led by Karrin Murphy, regularly employs Dresden as a consultant to help solve cases of a supernatural nature.
The White Council, the recognized governing body of Wizards, has decreed the Seven Laws of Magic, which all magic users are expected to follow. Breaking any of the laws carries a death sentence except under very rare and special circumstances.