A pdf that seems to contain "high quality" examples like "use fewer borders" where the example made several commenters, including myself, say "That's worse." Not sure why I'd pay $100 for a PDF anyway but I'm sure as heck not doing it when the kind of advice breeds less usable pages.
It's really hard to take the HN guidelines here at face value. It's hard to suppress the thought that this has been upvoted by a SEO-bot army.