Hard to come by publication. As the title suggests, this book is devoted to mayfly imitations of each major stage - nymph, emerger, adult and spinner - top to bottom, as Stalcup says. For each section, he offers up several patterns, each with an introductory essay, step-by-step tying instructions, and a list of variations. While the bulk of the book is devoted to his flies and tying instructions, the opening chapters deal with materials and tools. He also has a short chapter that is devoted to techniques used throughout the book. Whether a treatise on trailing schucks, a step-by-step tutorial on extended bodies, or the various styles of biot bodies, each topic is presented in details and supported with crisp, clear colour photographs - enough photos to illustrate each point, with supporting text to carry us from step to step. The pace of information flow is brisk, but nothing has been omitted in the name of space savings. A must-have for the serious tyer. Very good condition, full colour throughout. Softcover, 159 pages, 28cm x 22cm.