This three-volume collection serves as a comprehensive resource for keyboardists seeking to perform liturgical and religious music within a communal worship setting. The compilation gathers various arrangements designed to support congregational singing and provide instrumental accompaniment for religious services. By organizing these pieces into a multi-volume set, the editors provide a structured progression of musical difficulty and thematic variety suitable for different liturgical seasons and service requirements.

The collection is regarded as a standard reference for church musicians requiring a broad, accessible repertoire for weekly services. Its multi-volume structure suggests a focus on utility and breadth, providing a reliable foundation for those tasked with musical leadership in a religious context.