This is a completely revised 2003 edition of volumes I and II of The Organ Music of J. S. Bach (1980), a bestselling title, which has subsequently become a classic text. This edition takes account of Bach scholarship of the 25 years prior to publication. Peter Williams's piece-by-piece commentary puts the musical sources of the organ works in context, describing the form and content of each work and relating them to other music, German and non-German. He summarises the questions about the history, authenticity, chronology, function and performance of each piece, and points out important details of style and musical quality. The study follows the order of the Bach catalogue (BWV), beginning with the sonatas, then the 'free works', followed by chorales and ending with the doubtful works, including the 'newly discovered chorales' of 1985. - Total revision of a best-seller - Covers the most admired part of the organ repertory - Provides valuable insights into the working of one of music's greatest minds Table of Contents Fugue in G Minor, BWV 131a Six Sonatas, BWV 525-530 Preludes and Fugues (Praeludia), BWV 531-552 Eight Short Preludes and Fugues, BWV 553-560 Miscellaneous Pieces, BWV 561-591 Concertos, BWV 592-596 Orgelbüchlein, BWV 599-644 Schübler Chorales, BWV 645-650 Chorales formerly called 'The Eighteen', BWV 651-668 Chorales from Clavierübung III, BWV 669-689 Chorales formerly called 'The Kirnsberger Collection', BWV 690-713 Miscellaneous Chorales, BWV 714-765 Chorale Variations (Partitas), BWV 766-771 Four Duets from Clavierübung III, BWV 802-805 Chorales now called 'The Neumeister Collection', BWV 1090-1120 Further works, in part uncertain of origin Calendar Glossary.