Whenever we search some article or some topic many a times books from books.google.com is displayed where one can view the pages of the book but cannot save pages or download eBook . To resolve this issue there is simple software which easily downloads online book available for viewing its name is " GBooks Downloader" (Freeware)
Follow the following steps
2. Go to http://books.google.com/books/ or copy link of topic which is already in view.
3. Search for any book you wanna download and copy its URL which will look something like below.
3. Paste the URL in GOOGLE BOOK URL, select Output Format hit "Star"
4. Downloading will start, wait until it shows "DONE"