Great if it could be possible to download them for offline reading, printing or copy text to use somewhere else as a reference. That's really possible however not all of the books on google books could be downloaded or pinted.
Here is how to find out whether you can download/print/copy text from a book available for online reading at google books.
Step 1 - Go to Advanced Book Search option in google book search
Step 2 - On the Advanced Book Search page, select 'Full view only' option (it's a radio button) as 'Search'.
Check this example.
Step 3 - As a search result after step 2, you should see this in the right pane of your browser's window displaying the book.
Step 4 - Go ahead and download or view full text to copy and use the book.
