Google Books is a Google service that makes discovering book content easier for us on the web. It started way back in 2004 and since then its mission has been to digitally scan and archive tons of book. But Google Books does not allow you to download whole books unless it’s in the Public Domain. It also does not display the entire text of other books. What’s the point of using google books, you might say? Plenty, if you can ‘exploit’ the information that’s freely available. Just think, there are more than a million books in the Public Domain alone. If you have a yen for information and a zest for lifelong learning, here are ten ideas for using Google Books.
http://www.makeuseof.com/tag/10-ways-google-books-lifelong-learning-research/