Composer, theoretician, band leader, George Russell, first published the Lydian Chromatic Concept in 1953, and, for almost 50 years, worked on further refining it. This result is this final edition, published by the estate of Mr. Russell. "Surpasses any musical knowledge I've been exposed to." Ornette Coleman. "All of the music's most important developments from modal improvisation to electronics...to free form atonality to jazz-rock have taken cues from Mr. Russell's pioneering work." Robert Palmer, The New York Times.