This Orvis Fly Patterns Index by John Harder is a highly recommended book for sports and recreation enthusiasts. It features 20 pages of detailed information about fly patterns with spiral bound and trade paperback format. The book measures 8.9 inches in length, 6.6 inches in width, and 0.6 inches in height with a weight of 15.4 ounces. The book was published by Penguin Publishing Group in 1990 and written in English. Its genre is Sports & Recreation, and the topic is General. This book is perfect for those who want to enhance their knowledge of fly patterns and is an excellent addition to any book collection.