The page contains a link that says "If you want to get a copy, you can download a digital copy for free." Clicking this link either asks you to name a price (for something you haven't yet had a chance to evaluate) or takes you to a page that either has no actual .PDF download link, or has hidden it well enough to turn it into a puzzle.
Either way, not an ideal first impression. Designing electronics that work is a lot like designing a web page that works: even if it doesn't end up simple, it should almost always start out that way.
Either way, not an ideal first impression. Designing electronics that work is a lot like designing a web page that works: even if it doesn't end up simple, it should almost always start out that way.