{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Ultra Versus U-Boats: Enigma Decrypts in the National Archives","author_name":"Roy Conyers Nesbit","thumbnail_url":"https://www.ebooknetworking.net/books/B00/DN5/bigB00DN5U58Q.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B00DN5U58Q.html\">Ultra Versus U-Boats: Enigma Decrypts in the National Archives</a>","width":400,"height":300}