The Revolution Will Not Be Online

Though one can read a hell of a lot about past revolutions online thanks to 'Google Books', which has for example large chunks of Pierre Broue's The German Revolution up here to 'preview'. I am not really sure about 'Google Books' to be honest - in a sense it is a good thing that such stuff is online but if you actually try and read very much of it it is so full of blanks and missing pages it makes you wonder why you actually bothered and what the point is of 'Google Books' (apart from trying to get you to buy the book obviously). Or have I missed something?