> Though I guess people would argue you can just ask a LLM now instead of reading my book.

I would certainly not argue that. LLMs do not understand anything, and are thus prone to non-deterministic inaccuracies in their output. Due to that, I think it is extremely foolish to use one for learning unfamiliar topics. Give me a book every time, because (if it's a good book) I am guaranteed to actually learn something. Not so with LLMs.