These paperback editions makes Peter Williams's influential scholarship available to a wider field of readers, including those with an interest in the ever-expanding discussions of original instrumentation and its implications for modern performance. Professor Williams examines Bach's organ works piece-by-piece, reconstructing for the present-day performer and listener the original context of the work. Form and style are analysed, with abundant musical examples and frequent allusions to the views of other commentators. Each volume contains a preface, calendar, lists of musical sources and references, and an index.

This book, first published in 1984, is the third volume of Peter Williams' important reference work, The Organ Music of J. S. Bach. In this volume, Peter Williams lays before the reader the salient points that serve as an appropriate bckground to the pieces: notes on the church services of the area in question (Thuringia - Saxony), the fitful tradition of recitals, the duties of organists, the composer's indebtedness to former and contemporary styles in music, his knowledge of organs, the relevance (often over-valued today) of theorists, details of the instruments he was acquainted with and what can be assumed about the way they were registered and played. Throughout, the author has aimed to present a background to this music and its playing and has avoided stepping into areas of high conjecture, such as chronology or how specific pieces are to be played.