{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Down the Great Unknown: John Wesley Powell's 1869 Journey of Discovery and Tragedy Through the Grand Canyon","author_name":"Edward Dolnick","thumbnail_url":"https://www.ebooknetworking.net/books/B00/4KA/bigB004KAB654.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B004KAB654.html\">Down the Great Unknown: John Wesley Powell&#039;s 1869 Journey of Discovery and Tragedy Through the Grand Canyon</a>","width":400,"height":300}