Book excerpt: The final book in this power-packed mandolin method continues with a study of advanced harmonies and provides mandolin chord forms in all twelve keys. In-depth studies of important forms such as the 12-bar blues and "rhythm changes" are included as well as chord/melody playing and chord substitution. The book also takes an exhaustive approach to melodic studies, covering the modes of the major scale, the pentatonic scales, the chromatic scale, the whole-tone scale and improvisation.