<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/book/Head-Heart-History-Christianity-America/rzqa2MJD3EOAFIoj_Eo_ZQ?MixID=rzqa2MJD3EOAFIoj_Eo_ZQ&PageNumber=1>