>>24545494
Ender's Game is pretty good if she likes sci-fi, but 9 may be too young(?)

If she likes Wayside school, you'll love David Lubar's "Lawn Weenies" books. There are at least 3 and they're all goofy short horror stories (but like, Goosebumps level horror). Actually, Goosebumps is probably another good option