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...