This book is devoted to the forgotten chords from harmonic minor and harmonic major. It is addressed to the advanced musician who already has the theoretical basis at his disposal. But in order to explore the area of harmonic minor and harmonic major, a closer examination of those scales and chords that precede the forgotten chords is required, i.e.: the church modes and the melodic minor system. In this concern, it is also useful for the beginner who first wants to get the general idea of jazz theory. Titles: Introduction * The Limited Application of Chords Derived from the Church Modes in Traditional Jazz Cadences * The Limited Application of Chords Derived from the Melodic Minor Modes in Traditional Jazz Cadences * The System of Church Modes * The Melodic Minor System * The Harmonic Minor System * The System of Harmonic Major * The Six Chord Categories * Multiple Applications of a Chordal/Intervallic Constellation of the L.H. Voicings * Harmonic Minor and Harmonic Major as Basic Chordal Material.