Book One of the Dresden Files
If you're ever in Chicago and in need of a wizard's services, call Harry Dresden. Harry Blackstone Copperfield Dresden is a wizard for hire. Sound strange? It is, but somehow, Jim Butcher makes it seem not so strange.
Harry consults on all sorts of cases that may involve magic, including police matters. When he is called to the scene of a grisly double murder, it is clear that black magic is involved. How else could the victims' hearts have been ripped out of their chests?
For fans of the Anita Blake series, the Dresden Files are fast paced fun. I might even read the next entry in the series!