My DD really enjoyed the Fairy Realm series--positive main character, adventure that isn't too scary....not the "deepest" reads, but nice and enjoyable.

I also HIGHLY recommend the Betsy-Tacy series (although I find the first book a little slow and it has a sad reference to Tacy's baby sibling dying). You could easily start with the second book. They are WONDERFUL, and there is a nice sized list of them if she likes them.