Included in this book is the following: - Chord construction (extensive); - Chord substitution; - Inversions; - Audio links; - Chord charts in keyboard view showing just about every chord that you will ever need including 7ths, 9ths, augmented, diminished etc. and how to play an effective 13th chord with just four notes; - Free Printable PDF Download. Note that all of this information plus an enormous amount more is also included in my paperback books...