Trying to find some suggestions beyond the utter depressing, sex-filled, normalizing-bad behavior-books that are drowning our young girls in bad ideas.
She’s read lord of the rings, Harry potter, some CS Lewis, etc.
If she likes Tolkien, I recommend The Hobbit, The Silmarillion, and The Lost Tales, and other books in the canon. There is a ton of great Tolkien material that goes way beyond LOTR.
CS Lewis series are also very good books, and he and Tolkien were actually close friends in real life.
My 16 year enjoys some other fantasy authors, and I will talk to her and let you know.