So does any site that quotes the book. Just being trained on a work doesn’t give the model the ability to cite it word for word. For most of the books in this set you wouldn’t even be able to get a single accurate quote out of most models. The models gain the ability to cite passages from training on other sources citing these same passages.

That claim is disingenuous at best, and misinformed otherwise.

That’s maybe an issue. I mirror speech a lot, though. How large are the passages?