<http://schema.org/description>
"There are about 120,000 books published every year, and that's far too many for anyone to make an informed choice. You need some kind of recommendation. ..."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.huffingtonpost.com/2010/06/29/want-to-find-new-books_n_629191.html>