I have literally found tons of books using Google Book Search, however browsing the books online is time consuming and I would definitely want a way to download those books and read them at my leisure.
Not that we haven’t unearthed something that already does that, the Google Book Downloader for desktops is something I often use, but the software does require users to perform several steps, like finding the right book id and so on.
The Google Book Downloader Greasemonkey script is a surefire way to save time and quickly download books that you come across on Google Book Search.
Just install the script and you will see a link to download the books from Google Book Search.
Once you have installed the Userscript, you will see a link to download the book in the right hand side navigation, clicking on this link will give you a option to choose from which page should the book be downloaded from.
Once you have selected the page number to start from the Userscript will begin downloading the book and save it to your hard drive create download links for the pages, clicking on which will save open the page.