Alex by Pierre Lemaitre is only 99p on kindle at the moment. It's the best crime novel I've read in a very long time. It is dark and pretty graphic but excellent.
If you buy and read it please come back and talk to me about it. My DH is reading it soooo slowly I'm going to have to follow him around reading it to him.
Oh and feel free to recommend other crime bargains. (Non self-pubbed recs for me, thanks)