The unique character of Elliot Carter’s harmonic idiom has long been the subject of speculation and study. This extraordinary book is the key to the careful evolution of this aspect of the musical thinking process of one of the most influential American composers of our time. From 3-note chords to 12-note aggregations, Harmony Book explores the harmonic relations of the 12-note chromatic scale as employed by Mr. Carter since his decisive work of the 1960s.