{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Principia mathematica","author_name":"Alfred North Whitehead, Bertrand Russell","thumbnail_url":"https://www.ebooknetworking.net/books/117/829/big1178292991.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1178292991.html\">Principia mathematica</a>","width":400,"height":300}