Book excerpt: This volume contains three classic articles on the subject of church organs which primarily deal with 'registration' and general technique. They include: “The Organ – Its Total Structure and Registration, by Cecil Clutton”, “The Organ Student's Gradus ad Parnassum – Book I. The Elements of Interpretation, by Casper Koch”, and “The Technique and Art of Organ Playing, by Clarence Dickinson”. This volume contains a great deal of information pertaining to the technical side of organ playing, and as such it will be of considerable utility to all with an interest in learning or improving existing organ-playing skills. Many vintage books such as this are increasingly scarce and expensive. It is with this in mind that we are republishing this volume now in an affordable, modern, high-quality edition complete with a specially-commissioned new introduction on the history of the organ.