DD is nearly 9 and reads a lot. She has read pretty much all of the books mentioned on the other post (although there were a few mentioned that I will try). Her favourites remain Narnia, Harry Potter and Lauren St John ones (One Dollar Horse and White Giraffe series). I think she needs to move on to the next stage - whatever that might be, but don't know what to get her. We spend a lot of time in the library, but it can be hard to choose - the best things are usually on loan so you have to think about reserving them, and therefore what to reserve, rather than just browsing.
I can't remember what I was reading at that age (except for The Thorn Birds, stolen from my mother, which definitely wasn't age appropriate (!) and endless Georgette Heyer).