(Guitar Educational). Three books in one First, a music theory manual that describes the different types of twelve-bar blues forms (slow change, quick change, five chord blues, jazz blues, etc.) and presents them as both chord progressions and structural formulas. Second, an introduction and thorough study of -rhythm- chords the essential three-note voicings that every guitarist must know for accompanying small blues groups to jazzy big bands. Third, a comprehensive series of twelve-bar chord progressions that range from a basic three chord blues to the most advanced, multi-chord jazz...