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. To do so, he based himself as faithfully as possible on the manuscripts that can be traced back to Bach or to his circle. Here the American Bach expert generally chooses one source as his principal one. Divergences from other sources are documented in the Commentary. On the whole, the new Urtext edition sometimes also emends some long-cherished readings of ornaments, voice leading and notation. The online presentation of this volume provides the Prelude and Fugue in f BWV 534, which has often been published under Bach’s name despite the work’s unclear authorship as well as the two versions BWV 543a/1 and 535a/2 for synoptical depiction. Table of contents 1. Praeludium et Fuga in e (BWV 533 ) 2. Praeludium et Fuga in e (BWV 548) 3. Praeludium et Fuga in G (BWV 541) 4. Praeludium in G (BWV 550) 5. Praeludium et Fuga in g (BWV 535) 6. Praeludium cum Fuga in g (BWV 535a ) 7. Praeludium et Fuga in A (BWV 536 ) 8. Praeludium et Fuga in a (BWV 543 ) 9. Praeludium in a (BWV 543a/1) 10. Praeludium et Fuga in h (BWV 544) 11. Appendix: Praeludium et Fuga in e (BWV 533a ) 12. Appendix: Praeludium in a (BWV 551) Praeludium und Fuge in f BWV 534 (online) Fuga in g BWV 535/535a, synoptic view (online) Praeludium in a BWV 543/543a, synoptic view (online)