Timber automatically retrieves full metadata for products that you add to your site based on ISBN number. Ingram is the third party provider that we use to automatically add data like cover image, descriptions, page counts, author and more. This works great with common titles, but some of the more obscure collections were difficult to populate. We've recently added Google Books to retrieve some of the less common books' attributes and are very happy with the results. Google Books was automatically added to all Timber sites recently.