Sallis shows how folk music and a cross-fertilization of traditions and techniques resulted in blues, ragtime, jazz, rock 'n' roll, and country-western. He writes eloquently about fourteen transitional or pivotal performers: the Mississippi Sheiks; Lonnie Johnson, the first virtuoso blues guitarist; Eddie Lang, the first great jazz guitarist; Roy Smeck, the foremost popularizer of guitar playing; Charlie Christian, the founder of modern jazz guitar; Riley Puckett, the first great country-music guitarist; T-Bone Walker, "daddy of the blues"; George Barnes; Hank Garland; Wes Montgomery, the jazz innovator; Mike Bloomfield, the heavy-rock guitarist; Ry Cooder; Ralph Towner; and Lenny Breau.