The Blues Scale by Andrew Gordon is a very important book because of the nature of the blues scale and how it is used to improvise in many styles of contemporary music. Inside both the Blues scale and relative minor Blues scale are explained in detail and how they are used either separately or together in the patterns for each style. Each of the 20 grooves in this book contains over 150 patterns in total, using notes solely from the blues scale. Each of the 20 grooves utilizes a chord progressio...