If you're into detective/police stories, then I would suggest the book
Homicide:A Year on the Killing Streets by David Simon.
It's not fiction, but reads almost like a novel.
A journalist, Simon, spends a year patroling the streets with the Baltimore Police Homicide Unit.
To me it's a must read for any fan of the police procedural genre, wether in book, tv or movie form.
David Simon is one of the men behind the tv series "The Wire"