The data in this book applies to any musician at any level of expertise regardless of what instrument or style of music he/she plays. This is invaluable as a reference book for private lessons or as a textbook for classroom study. This Book answers many interesting questions such as: * Why are 4 note chords called 7th chords? * What are the eight types of 7th chords? * Did you know there are up to 5 different chord symbols for each 7th chord? * What are the Diatonic 7th chords? * Why are they important? * How do you decide when to play a 7th chord instead of a triad? * What are the three different blues scales? * What type of 7th chord is the most common in blues? * Why do many people fail in their attempt to learn to improvise? * How can I learn to improvise over difficult chord changes? * What are the most common intros, turnarounds & endings to songs? * What are Rhythm Changes and why are they important? And many more