<http://schema.org/thumbnailUrl>
<https://gigaom.com/wp-content/uploads/sites/1/2012/02/kindle-reader-o.jpg?quality=80&amp;strip=all>
<http://gigaom.com/2010/11/08/419-why-the-book-business-may-soon-be-the-most-digital-of-all-media-industr/>