<http://schema.org/thumbnailURL>
"http://d28hgpri8am2if.cloudfront.net/book_images/cvr9780684844640_9780684844640_th.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://books.simonandschuster.com/Across-the-River-and-into-the-Trees/Ernest-Hemingway/9780684844640>