In his Preludes and Fugues, Johann Sebastian Bach made decisive contributions to the development of this genre tradition. The importance of this work group in his own organ oeuvre is confirmed by the many transmitted sources: hardly any autographs, but all the more copies. The genesis of the works and the question of versions associated with it are described at length in the introduction.In his new edition, editor David Schulenberg occasionally makes a new evaluation of the transmitted sources. ...