<http://schema.org/thumbnailURL>
"http://d28hgpri8am2if.cloudfront.net/book_images/cvr9781451625370/hole-at-the-bottom-of-the-sea-9781451625370_th.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://books.simonandschuster.com/A-Hole-at-the-Bottom-of-the-Sea/Joel-Achenbach/9781451625370>