(Berklee Guide). The Chord Factory is for all levels and styles of chord explorers, from professional-level guitarists in need of harmonic stimulation and to fill in some gray areas, to the early-level guitarist just embarking on that fascinating and fun aspect of exploring chords and harmony. This added chord vocabulary and understanding will strengthen all areas of your musical world as a performer and composer. | The Chord Factory by Jon Damian, Paperback | Indigo Chapters