Reddit reviews Out from Boneville (BONE #1)

Seeing as she likes to read, would you consider a comic book? "Bone" by Jeff Smith is age appropriate, has strong female main and secondary characters and is overall a great read. I bought this several years ago for my 9 year old cousin and she devoured it.

Here is volume 1, of 3 on Amazon

And depending on your budget here is the complete story in one volume although this is in the original black and white, I think it loses something not having the colour.