George Van Eps Harmonic Mechanisms for Guitar, Volume 1 The most in-depth, revolutionary presentation of the harmonic framework of music is applied to the guitar fingerboard ever presented. Leads to total mastery of harmonic and technical aspects of the guitar. The material in this landmark series of 3 massive volumes address virtually every aspect of playing jazz guitar representing the fruits of years of the author's investigation of harmony and fingerboard mobility. This series of books leads to total mastery of the harmonic and technical aspects of the guitar. In notation only.