The purpose of this Book is to clarify and thereby simplify advanced music theory and to offer a comprehensive reference. Additionally, this Book provides a route to greatly increased musical skills, for those who wish to invest the time. I've had various dealings with thousands of musicians. Some as students, some as peers, some as employers, and some were fans, etc. I can safely say that only a very small percentage of them had a good grasp of advanced music theory. However, many of these musicians were incredible artists who had very successful careers. So the question is: Is understanding advanced theory important? An analogy is driving a car. You don't have to understand everything about how cars are built or how to repair them to successfully drive one. However, if you did study cars more in depth, your interaction with them would probably be enhanced. Additionally, if you have been exposed to any of this material before and have some misunderstandings, you will want to clear those up, because those questions can impede your music making. 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. (Except drummers) 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: * Is 'theory for the sake of theory' a good idea? * Why has Music theory has gotten a bad reputation? * What are the 4 reasons some musicians think it will stifle their creativity? * What are the 44 different types of scales? * Which scale goes with which chord? * What are extended chords, slash chords, poly-chords? * What notes are in the 31 13th chords? * Why are many scales and chords considered ambiguous? * What is more important than the technical side of improvisation? * How does one become a monster (slang - a master musician, a virtuoso)? * What are the two 12 bar progressions that if mastered in all keys, will provide an excellent foundation? And many more!