<http://schema.org/thumbnailURL>
"http://d28hgpri8am2if.cloudfront.net/book_images/cvr9781439150559_9781439150559_th.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://books.simonandschuster.com/In-the-Valley-of-the-Shadow/James-L-Kugel/9781439150559>