Aw, I want my son to go to a school where he get to make maple syrup
I was that kid, too. And I am that adult, except sometimes the two sleeping kids piled across me help pull me into dreamland. I would try really, really hard to honor that need to wind down.
If you find she's getting pulled too much into her novel, can you set out a smaller subset of books to reread that help her sleep? Nothing too exciting, maybe non-fiction? We still read my son to sleep, and there are definitely some books that help him fall asleep more easily than others.