I just bought a Sony PRS 505sc digital reader. I thought I would be able to download audio books from my library and transfer them to my Sony reader. I have been able to do a regular electronic book by downloading to digital edions. When I try with the audio books (which have been downloaded with Overdrive from the library) I get a message that the audio books are not the proper format for the Sony reader. Is this the case? If so this reader won't do me much good. There are very few electronic books available, especially best sellers.
Thanks in advance. If this is confusing I'd be happy to explain more details.