<http://schema.org/keywords>
"Fiction, Action & Adventure, Fairy Tales & Folklore, Legends, Myths & Fables, Literary, Middle Grade, Preschool, Toddler, Picture Book"^^<http://www.w3.org/2001/XMLSchema#string>
<http://books.simonandschuster.com/Toothiana/William-Joyce/The-Guardians/9781442359406>