This volume investigates the historical development, technical construction, and cultural significance of the organ as a musical instrument. Douglas Earl Bush and Richard Kassel, both established scholars in musicology and organ performance, synthesize centuries of technical data and historical records to provide a comprehensive reference framework. The text organizes complex mechanical information into an accessible format, serving as a primary resource for understanding the evolution of organ building and its role in global musical traditions.

Experts recognize this work as a foundational reference text for musicologists and organists alike. Readers frequently note the academic density of the prose, which provides a high level of technical detail suitable for professional research.