I don't know of many recorded audio books, but you could also use a Text to Speech engine to listen to any technical blogs or articles. I use Android apps like Pocket or T2S to queue up a backlog of TODO read items, then when I'm out for a long walk, I can just press play and let the TTS do it's thing. Of course, I curate this list for longer pure text reads, devoid of code snippets, equations, or visual graphics that TTS would have a tough time conveying over audio.

Looks like I may need to find a successor to pocket. They do a great job scraping connect via readable mode, but I'd like to find a shelf hosted or mobile+offline app equivalent for queuing up web articles, just in case pocket gets cut from further development by Mozilla management.