Jeez, if you really like playing dissonant eighth notes using only two strings, with a backing track that's so jazzy it doesn't even sound good... then this book is for YOU!I bought this book after I bought a 7-string thinking I could learn something new and interesting. It would be nice if the other strings were used occasionally, and if you listen to the practice CD, the only thought you'll be left with is "Why would anyone want to play music that sounds like this?"I can see a very small amount of usefulness here if you are such a great jazz guitarist that you don't need "keys" and "music" holding you down. Just about any other jazz guitar book would be a better buy than this one.