A self-study course with illustrations & examples for you to write & check your answers. Topics include: major and minor scales; modes and other scales; harmony; intervals; chord structure; chord progressions and substitutions; and more. This workbook contains essential "backbone" concepts for working musicians. These are the things you must know. It may take a year to work through and thoroughly understand and memorize all that is in this book - and a lifetime to perfect it. But that's okay: You will own this valuable resource and have it for handy reference.