<http://schema.org/thumbnailURL>
"http://d28hgpri8am2if.cloudfront.net/book_images/cvr9780794600761_9780794600761_th.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://books.simonandschuster.com/Diving-Southeast-Asia/David-Espinosa/Periplus-Action-Guides/9780794600761>