The Natural Harmonic Series is shown to be the source of all musical scales and chords and the simplest approach to understanding and mastery of music theory - a subject which has been a source of confusion historically for lack of this context.
While this book is technical in nature, it is presented in a clear, logical and comprehensible manner. No previous experience with Just Intonation is required of the reader, though a general familiarity with musical terms and concepts as well as basic arithmetic is assumed.
This 2nd Edition includes photos of 20th century microtonalists and their instruments, as well as many new charts, diagrams and scores.
The music in the album, PRMJI (available at www.worldharmonyproject.com) illustrates the principles and concepts described in the text.