Allows you to easily add a book you are viewing to your read, to-read, or currently-reading shelf on Goodreads.
Very simple extension that allows you to add a book to either your "to-read", "currently reading", or "read" shelf without leaving the page you are on. This extension is designed to work on individual product pages, and does just that for most popular sites such as Powells, Google Books, Amazon, and plenty of smaller Web sites.
How it works: This extension loads the "Add to My Books" widget (http://www.goodreads.com/api/atmb_widget) using an ISBN number scraped from the current tab. It isn't designed for pages with multiple ISBN numbers, and will simply choose the first valid ISBN it sees. Since it isn't limited to a specific book site, it requires the "Your data on all websites" and "Your tabs and browsing activity" permissions.
Code available here:
Please feel free to make any suggestions/contributions.