{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Summary of the Course of Permanent Fortification and of the Attack and Defence of Permanent Works: For the Use of the Cadets of the U.S. Military Academy","author_name":"Dennis Hart Mahan","thumbnail_url":"https://www.ebooknetworking.net/books/114/195/big1141954265.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1141954265.html\">Summary of the Course of Permanent Fortification and of the Attack and Defence of Permanent Works: For the Use of the Cadets of the U.S. Military Academy</a>","width":400,"height":300}