With CPO's Volume 15, their comprehensive project featuring organ works of the Northern German Baroque is now complete. On the last release, Friedhelm Flamme dedicates himself to the complete free organ works, that is, to the complete fugues and preludes, of Heinrich Scheidemann, a composer regarded as one of the co-founders of the Northern German organ school. Some of Scheidemann's chorale settings are also presented. Johann Adam Reincken succeeded Scheidemann as the organist at St. Catherine's Church in Hamburg after his mentor's death and is regarded as his most important pupil. Scheidermann's activity and influence on other organists and choirmasters brought him great respect in Hamburg's music world, and he is regarded as one of the most significant composers or organ works from the early seventeenth century. Here we would like to thank our interpreter Friedhelm Flamme for his renderings of Northern German marvels of organ sound. His recordings demonstrate how genuine technique and virtuosity can be combined with intellectual probing to produce sensational results.