The Audsley classic from 1921, the softcover includes a four-page introduction by American organ historian Rollin Smith. Smith presents a very brief biography of Audsley and reviews Audsley's association with the organ. The book itself is a standard reference and gives the names of organ stops, defines them, and traces their origins, describes their construction, their tonal characteristics, and their use in registration. Stops are arranged alphabetically. A must for any organ library. Hardcover and softcover available; 298 pages.