I am not aware of any audio books. However there are some recorded video materials with audio of the talks at: http://www.testingeducation.org/ , as has been pointed out often by Michael Bolton on this site, these are the courses of Cem Kaner.
Also the talks of James Lyndsay have also been recorded and can be downloaded and played back from his website: www.workroom-productions.com
There are also a number of webinars which have been recorded and are still available for download from a number of tools vendors on specific aspects of testing.
Quick question: Why an audiobook? Is this as a supplement to a hardcopy book? Or, is it desired as a replacement? I can't speak for anyone else but I am fairly notorious for marking the heck out of some of the books that I buy/read. Kind of hard to take notes in an audiobook.