I agree with Cat. Think about it - there are literally thousands of books out there - there MUST be something that she is interested in. A good start I've found is finding one that is funny. Once you've found something she likes, get her to read it to you and you can both comment on it whilst she is reading it (which might also help her to remember) My daughter is 8 and loves Roald Dahl and the Bloody History books. I've also just bought the Lemony Snicket books which look good!
Good luck...