If you're looking for more computer security / hacking related books, I can recommend "Sandworm" (by Andy Greenberg) and "The Cuckoo's Egg" (by Cliff Stoll). Both appear to have audible versions.
I'm not sure about the "not as well known" part, but these are some other books similar to Countdown to zero day and most of them have audiobooks available.
For those not interested in the whole narrative, it's still interesting to browse one or two chapters of interest.
https://www.amazon.com/Countdown-Zero-Day-Stuxnet-Digital/dp...