WARNING: Librarian Rant Ahead
I'd like to second going to the library and having your daughter talk to the children's librarian. They'll show her what's available, and anything new that's up and coming. It's also great experience for her to speak up for herself in a safe environment. And she'll learn her way around a library, which seems to be a lost skill by many.
Our biggest challenge at the library is finding age-appropriate books for kids reading "above their level." Many public libraries tend to be more conservative in collection development, so in the junior fiction we would shy away from items with cursing. In particular, we put items with cursing in junior high. When the librarian tells you to read the book first for being iffy, skim it. Make sure you're ok.
And I agree with most of the suggestions already made, including whoever said HP gets a little too old for an 8 year old. By book 4, they're dark and violent and complicated. And wonderful, but not always age appropriate.
My 2 cents.