@Kay-Dub,
I did look into buying online audio books but once I found that they all copy protected the files I said the hell with it.
Now instead of them getting my money I take the books out of the public library and ripped them to mp3 files for free.
Not going to pay good money for copy protected material and end up running into your type of a problem.
Suggest you stop buying audio books online as long as they sell them with copy protections.