Listening to "Snuff" by Terry Pratchett. I borrowed it from the library and am enjoying it tremendously.
I usually listen to thrillers because I use them to pass the time on the rowing machine. I gave up on "The Hades Factor" by Ludlum, "Inferno" by Dan Brown, "The Undead Situation", and several others simply because they were pretty boring. I can handle boring in print, but not an audiobook. I can skip or skim with print, but tougher to do with audiobooks, especially when it's across the room from me.