"The Orvis Guide to the Essential American Flies" by Tom Rosenbauer is a comprehensive nonfiction book focusing on fishing, specifically American flies. Published in the 1980s by Globe Pequot Press, this first edition hardcover book features 208 pages filled with essential information and illustrations for adult anglers interested in fly fishing. With the author's expertise and attention to detail, this book serves as a valuable resource for anyone looking to enhance their knowledge and skills in fly fishing in the United States.