Audio Books are on the Rise - Are You Riding the Wave?

I am at The Insecure Writer’s Support Group today with book formatting tips.
Five-six years ago, the only book format plunging faster than audio books was the mass-market paperback.
Now, thanks to downloadable mp3s and the rise of people listening with their cell phones, audio books have made a big comeback.
While some continue to produce CDs, most publishers and authors have migrated to downloadable content. With companies such as ACX, it no longer costs a fortune to produce an audio book.
Ov...