<http://schema.org/thumbnailURL>
"http://d28hgpri8am2if.cloudfront.net/book_images/onix/cvr9781879181533/psyearth-quest-9781879181533_th.jpg"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.simonandschuster.com/books/PsyEarth-Quest/Charles-Bensinger/9781879181533>