{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Practical Relativity: From First Principles to the Theory of Gravity","author_name":"Richard N. Henriksen","thumbnail_url":"https://www.ebooknetworking.net/books/047/074/big0470741414.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0470741414.html\">Practical Relativity: From First Principles to the Theory of Gravity</a>","width":400,"height":300}