A remarkable combination of superb artistry, sophisticated design, and a lengthy history of continuous usage sets the masks of the Noh theater of Japan apart from all others. That so little is known outside of Japan about their great beauty and brilliant craftsmanship prompted the author to undertake the two decades of study, research, and writing that has culminated in this work. The result is nearly 800 pages of text and images published in a two-volume boxed edition limited to 1200 copies. Volume 1 consists of an extended treatise on the history of Noh and the evolution of its masks, including mask forms and functions, types and roles, nomenclature and taxonomy, mask carvers and their lineages, signatures, and other markings. It includes plot and character synopses of the plays most often staged as well as others other rarely performed, with particulars about the masks used by various troupes for the principle roles. Volume 2 is an album showcasing in full color over 140 of the finest masks of Noh, both ancient and more recent, with detailed information on their creation, character, and significance, as well as photos of their backs showing inscriptions and artists' signatures. An extensive bibliography, glossary, and index round out this presentation of an exquisite, centuries-old art form. No existing publication on the subject, in either English or in Japanese, remotely compares in scope and depth to the present work.