The idea behind this book is to provide the progressive guitarist with a comprehensive overview of chordal structures on the guitar fingerboard. Starting with triads, then working through 7th and 9th chords and further extensions, chord substitution relationships and practical examples over standard chord progression, the book presents a chordal concept based on logic rather than just memorized shapes. This book will make it easier for today's guitarists to understand the complex chordal structures used in contemporary jazz.