All fourths tuning refers to tuning one's guitar such that the intervals between the stings ascend in fourths. Why should you tune to fourths? • Chord, arpeggio and scale shapes are uniform • It's ergonomic • One has control over jazzy voicings • One has control over intervals • It's easy to make quartal chords This book includes: • Over 100 fingering diagrams • 14 sheets of song transcriptions • Copious explanations of jazz theory • Tips on composition and performance.