My DS9 devours books too. 10 a week this summer. I'll give you some reading lists to check out. I would let her read what she wants as long as you think it's not unappropriate like too scarey.I would not push her to read. You can have her help you request books from the library on their website.

I keep wondering how I will be able to keep up with his demand but somehow I do it. Librians have expressed they wonder about us at the library. We have fun with that.

http://www.hoagiesgifted.org/reading_lists.htm
http://www.hunter.cuny.edu/gifted-ed/docs/Animal%20Fantasy%20List.doc
http://loreenleedy.com/
http://store.exploratorium.edu/browse.cfm/2,98.html
http://www.oldtrail.org/readinglists.htm
http://www.readkiddoread.com/home

If you search for school websites, look for their summer reading lists, look at gifted websites, look at libraries websites try NYC library. Library's have books with lists of ages & types of books.

Happy book hunting. Loving to read is a wonderful gift. You should be proud.