After getting configured and utilized this E book Schema style on your posts, search engines like yahoo like Google will possible showcase it as rich results around the search results web site, just like the picture below. "Invalid floating position amount in property 'selling price' . the issue is introduced https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html