His most famous novel is
Fight Club, which was turned into the Brad Pitt movie. As for style, I guess horror is what most people label him, although that probably gives a wrong impression... It's hard to describe but it's definitely disturbing. In a good way, though.
If anybody wants to check him out (and has a strong stomach) his short story "Guts" can be read
here. But be warned. It's kinda ugly.