I've just discovered (thanks to Hathi Trust, who /do/ respond to more than slightly grumpy emails) that SOME Google Books materials can in fact be downloaded as PDFs, hiding under the Gear icon, top right.
Mind, this after *years* of using the site. Cue gripe on UI/UX design.
It regularly adds and documents locations you can get books online for free, including HathiTrust and Google Books. It solely includes material you can get in it's entirety, not just books Google has indexed but doesn't share.
@dredmorbius You might be also interested to know that Google does "geo-shape" this feature. So one might want to access it from an US IP address and not e.g. German address. YMMV depending on title of course.
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