(Music Sales America). Unlock the mystery of chords and harmony with this book/CD pack that will improve your improvising and inspire your songwriting. With this book you will quickly learn how to master common chord progressions and how to transpose them into any key using a specially devised transposition chart. Explore altered chords and extended or exotic harmonies in an easy-to-understand way, and develop your own extensive vocabulary of open, bar and "jazz" chord formulations. The CD includes superb crystal-clear recordings supporting each lesson.