> I carefully craft and review these
> I'm not trying to claim it as my own
I'm confused, is it your book, or not?
here's an idea. you call it a "FOSS book"? OK, treat writing it like an open-source project.
start a public GitHub repo. have your chatbot generate chapter 1. commit it to the repo, and in the commit message document the LLM prompt you used. "you are an established author writing a book called Teach Yourself Quantum Computing in 24 Hours" or whatever.
then, whatever "careful" edits you make manually to that LLM output, do those as separate commits/PRs. show your work. the LLM is going to hallucinate and get subtle details wrong, your role as a human co-author is theoretically to be a subject-matter expert and catch those mistakes.