Can I listen to audio books with STREAM?

Yes. You will need to convert the audio books (AAX files) into .MP3 files and then download to the STREAM memory.

There are a lot of tutorials online how to convert the aax files to MP3 files. Just Google: convert aax to mp3 

Here are few links to help:https://www.tuneskit.com/audiobook-tips/convert-audible-aa-aax-to-mp3.htmlhttp://www.macsome.com/convert-to-mp3/convert-aax-to-mp3-mac.html

I hope that helps.