"The School of Voice Revelation" is a significant professional book based on extensive research conducted from 1910 to the early 1930s. The content was developed in close collaboration with Rudolf Steiner and was recognized by him in 1924 as a spiritually oriented training path for singing. This foundational work on singing has now been translated into nine languages and offers an in-depth exploration of the voice and its art. The structure of the book includes various phases of sound guidance, the physiology of the voice, and the art of breathing. It is suitable for both professionals and those interested in engaging with the theory and practice of singing. The clear organization and well-founded content make it a valuable reference work for anyone involved in the art of singing.