Yeah, I listened to them on audiobook myself. Also about 6 of them, give or take, oddly enough. I have been doing audiobooks a ton the last few years, as I rarely have time to just sit down and read. Perfect for when you're doing menial tasks that aren't mentally engaging. Doing dishes, driving, going grocery shopping... audiobook.
I've been on the Dungeon Crawler Carl series lately which is another great series that's also weird as hell. Weirder even than the Laundry Files by far. A half naked protagonist fighting for his life with his girlfriend's cat in tow, meth head llamas, and a dungeon-controlling AI with a thing for feet, just to name a few things from early in the first book. And the narrator for Carl sounds a lot like Patrick Warburton. Thoroughly recommend if that sounds like your kind of thing.