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. This volume presents also the early version of the C major Prelude BWV 545 as well as the inserted Trio movement of the three-movement version of this work.

Two further versions, which are also related to the Prelude and Fugue BWV 545, are available online.

1. Praeludium in C BWV 531
2. Praeludium et Fuga in C BWV 545
2.1 Trio BWV 529/2
2.2 Praeludium in C Frühfassung BWV 545a/1 3. Praeludium et Fuga in C BWV 547
4. Praeludium in C BWV 566
5. Praeludium in E BWV 566
6. Praeludium et Fuga in c BWV 546
7. Praeludium in c BWV 549
8. Praeludium in d BWV 549a
9. Praeludium et Fuga in D BWV 532
10. Anhang: Fuga in D BWV 532/2a