{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"The World's 20 Greatest Unsolved Problems","author_name":"John R. Vacca","thumbnail_url":"https://www.ebooknetworking.net/books/013/142/big0131426435.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0131426435.html\">The World&#039;s 20 Greatest Unsolved Problems</a>","width":400,"height":300}