So I just recently read The Summer I Died by Ryan C. Thomas and loved it! I've read all the Jack Daniels novels by J.A. Konrath and also really liked those. I am a huge Laymon fan and have read everything by him. I need new suggestions (but books that are available for my kindle). I like serial killers, blood and gore, with a side of humor. No fantasy or sci-fi, Koontz or King please. Also, I already know about Brite, Rollo, Goodfellow, Skipp and Spector.
hmmmm how about alan jacabson? 7th victim, crush, and the follow up to crush wich im fixing to start. may not be dark enough for you given the other books you have read but i think the crush maybe free download still.