If she has an official diagnosis of Dylexia she should be able to download and rent audio books from the blind and dyslexia assoc. Their website is http://www.learningally.org/
We are just waiting for an official diagnosis so we can join this site for DD10 who is also dyslexic. I believe the yearly fee to join is $20. If you decide to look into it, please pass along any feedback you have! I would appreciate it!