Part of the Organ collection by J. S. Bach, this first volume, Complete Organ Work - Nine Preludes and Fugues, was composed in the 18th century. This volume is now translated into English and French and features the annotation of Marcel Dupré, a French organist, to help the performer get the most of this sheet music.

This fourth book contains the nine following pieces:
- Praeludium et Fuga  C major
- Praeludium et Fuga  C major
- Praeludium et Fuga  C major
- Praeludium et Fuga  C minor
- Praeludium et Fuga  C minor
- Praeludium et Fuga  D major
- Praeludium et Fuga  D minor
- Praeludium et Fuga  E minor
- Praeludium et Fuga  E minor

The preface of these Nine Preludes and Fugues is well written, with explanations of the comments and descriptions of the techniques to use for a good interpretation of this work. This volume can be used by intermediate players and above.