{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"A treatise on field fortification, containing instructions on the methods of laying out, constructing, defending, and attacking intrenchments, with the general outlines","author_name":"D. H. Mahan","thumbnail_url":"https://www.ebooknetworking.net/books/140/696/big1406968072.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-1406968072.html\">A treatise on field fortification, containing instructions on the methods of laying out, constructing, defending, and attacking intrenchments, with the general outlines</a>","width":400,"height":300}