Originally, I did not have any content from an LLM. I still got 2 downvotes. I was saying "BRB, checking the book PDF using ChatGPT Pro ($200 per month)".

It's also more informative because Pro costs $200 per month. Plus costs $20.

An earlier version of GPT Pro solved a well-studied 60-year old conjecture on primitive sets, without human guidance. Short of peer review, which takes a long time, I reckon this is the best way to get an assessment of the author's book, especially compared to HN commenters' vibes.