{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Dr. Euler's Fabulous Formula: Cures Many Mathematical Ills (Princeton Science Library)","author_name":"Nahin, Paul J.","thumbnail_url":"https://www.ebooknetworking.net/books/069/117/big0691175918.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0691175918.html\">Dr. Euler&#039;s Fabulous Formula: Cures Many Mathematical Ills (Princeton Science Library)</a>","width":400,"height":300}