{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"North of Slavery: The Negro in the Free States, 1790-1860","author_name":"Litwack, Leon F.","thumbnail_url":"https://www.ebooknetworking.net/books/022/648/big0226485862.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-0226485862.html\">North of Slavery: The Negro in the Free States, 1790-1860</a>","width":400,"height":300}