Maggie Griffin told me to read Jim Butcher. When Maggie tells me to do something I usually do it.
I proceeded to get all the books, the first six are paperback originals, the latest two are hardcover.
It took a while but I started reading them.
And I love them.
Dresden is a PI in Chicago. He works with the special crimes unit. He's also a Wizard, a bit of a mavarick wizard usually on the outs with the wizard council. These books have all the classic elemants of great PI books, and the supernatural elements really makes them fun. They are being turned into Television fare by the SCiFI channel.
I strongly urge you to try them out.
Jim Butcher's Website