The organ book is a real treasure trove of works that are suitable for church services and expand and enrich the liturgical repertoire for organ. The pieces are all easy to moderately difficult, but even experienced organists can discover little-known gems of organ music among them. In addition to the main part, there is a volume with intonations for the call before the Gospel and accompanying music for the Gospel procession (Carus 18.075/30) as well as a CD with an exemplary selection of pieces.