Absolutely wonderful book on the art and technique of fly fishing. I learned so much from this book.
I actually went down to fish on the Beaverkill and, using some of Art Lee's suggestions, caught a 12" Brown Trout that I otherwise wouldn't have caught. I didn't see any other fisherman catch a fish that day, and there were plenty of people trying.
So much that the author wrote has helped to improve my technique. A must read for any fly fisher.