<http://schema.org/query-input>
"required name=search_term"^^<http://www.w3.org/2001/XMLSchema#string>
<https://store.kobobooks.com/en-us/ebook/Vril-The-Life-Force-Of?bookId=71c86184-4b98-40f4-b191-e5a7eabc1d8d>