More Than 30 Lessons for All Instrumentalists. This fascinating jazz instruction book for all instrumentalists offers an innovative, scholarly approach to the art of improvisation. It includes in-depth analysis and lessons about: cycle of fifths; diatonic cycle; overtone series; pentatonic scale; harmonic minor scale; melodic minor scale; polytonal order of keys (P.O.O.K.); blues and bebop scales; Ionian, Dorian and other modes; Byzantine and Arabian scales; and much more! A must for all musicians who want to hone their improv chops.