<http://schema.org/image>
<http://rack.1.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzQxL2dvb2dsZWJvb2tzLmFEbS5naWYKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/2d5b4bfc/a39/google-book-search-adds-new-organization-features-ae09ec6b63.jpg>
<http://mashable.com/2007/09/26/google-book-search/>