What is your opinion on Audio Books?

I think an important element to good audio retention is the intentions of the writer. If a book is written by a skilled writer, in a fluid, conversational manner, then a well-read dictation of it will likely be more enjoyable and carry higher retention.

There are some books (writing styles) that just don't translate to speech well. I believe that is more the writer than the content. A technically brilliant author can write in such a way that its impossible to follow word-for-word spoken, while his methods make perfect sense on the page.

Good topic OP- I have a few back-burner ideas involving audio components in web environments, and this area has always been of interest.

I like auditory learning if there is an actual person doing the speaking. Audio books never really cut it for me, it always feels to transitory. Without a real jaw flapping to anchor my focus it wonders off and gets lost. If you throw something else in there to help anchor your focus it works better. Several listens can also help it sink in.

With audiobooks (and speeches/lectures) I mostly listen when going to sleep. Then the next night I go back to the last part I remember and start back, usually recognizing a few more minutes as it plays, then reaching new material, and eventually falling asleep again.

If I were to sit and focus, I'd prefer regular text.

I tend to listen to audiobooks while driving, so I don't generally like content I need to think about. Notwithstanding that, if I don't have a visual, my retention and comprehension of difficult topics is horrid.

Audio books are nice, if the person speaks really clearly on them.