Joe HubbardÕs Chord Tone Sudoku Workbook, is more than just a method book, taking you deep inside the bass guitar fingerboard into the world of chord tone recognition. Understanding chord tone recognition is essential to learning how to improvise spontaneously over a harmonic progression. This book will enable you to apply this concept in real-world performance scenarios, along with a deepened understanding of the theory required to master these principles once and for all!