I'm in agreement with Harry on this issue. For the difference in price between a 505 and an iLiad, you can get a pretty nice mp3 player for playing audio books.
I personally listen to a lot of audio books. I've never considered trying to listen to them on my 505-PRS. When I'm listening to audio books, I'm usually moving around with earphones on and my mp3 player in my pocket or hanging from a lanyard from my neck. I definitely wouldn't feel comfortable banging my Reader around the way I do my mp3 player when I'm moving around!!
dordale