Xanth was written by Piers Anthony. The first dozen or so Xanth books were entertaining, until he degenerated into a dirty old man (or moreso than before). It’s entirely possible that the writing style didn’t change and just became irrelevant to me as I grew up, though.
Mm, books I read at that time. If she likes Lewis and Tolkien, I’d recommend giving her some David Eddings and Raymond Feist- you’ve got an easy two dozen books there. My only complaint about Feist is that he doesn’t have the books in a nice simple series like Eddings did- when I want to go back and read them in chronological order, I usually resort to checking the copyright date of each book and hoping that counts. (Yes, I know the general order, but you know what I’m talking about.)
I strongly agree with oldscratch on Harry Turtledove. I’m rereading his US alternate history series - The Guns of the South, about the South winning the Civil War, How Few Remain, about a second war between the US and Confederacy in the 1880s, and then his series of The Great War, about World War I.
I’m trying to remember the name of his Roman legion alternate history, but all I’m coming up with is Ranks of Bronze by David Drake. Same topic, I think.
Lloyd Alexander’s Prydain Chronicles. I think I cried at the end of those. Hrm. (Poor Taran. At least Eilonwy stayed with him.)
Also, in all seriousness, you may want to introduce her to Disney comics. I’ve gained a surprising amount of knowledge from Uncle Scrooge and Donald Duck- it became a running joke on the quiz bowl team in college that everything I knew I learned from comic books.
Robin Hobb’s Farseer trilogy is pretty good, although maybe a little verbose for her age.
Mm, well, back to work, and I see upon preview that tomndebb beat me to the mention of Lloyd Alexander. Teaches me to think about a post too much.