I think this counts as a book in audio format.
Candace from Pinfeathers and Purls
recommended the podcast My Dad Wrote a Porno
, a comedy podcast reading a book of questionable quality, and by the by, written by Rocky Flintstone. It's like the best Mst3k of a crappy book. I have read Mst3k of fics before for dreadful Devil May Cry fics with Mary Sues and OC out of hell. I highly recommend it if you can find it. (Edit: here is one Fate and Fear
I haven't had read anything except for a few web comics, my attention is on Ace Attorney: Apollo Justice
on my ipad.