Instruct: Classify Amazon reviews into positive or negative sentiment
Query: techniques, not patterns

Don't expect to learn a lot of new patterns from this book. It doesn't have any patterns, just techniques. Having trouble getting wings to stand up? This book shows you several ways. The techniques you use to accomplish any task in fly tying that I can think of are in this book, as well as variations on many of these techniques.It's not the only book on fly tying you'll want, because you'll want some patterns, also. That won't stop it from being the most important fly tying book you purchase, however.This one is a modern classic.