In the mid-20th century Southern and midwestern migrants produced some of the most innovative and vibrant music of the era. Entrepreneurs launched new record labels, radio stations, teen clubs, and record hops to showcase the hundreds of musical acts that emerged in the area. John Lyons examines the origins, progress, and diversity of this groundbreaking music scene through the eyes of the musicians, deejays, and label executives who made Chicago such an exciting and enriching place in the postwar period.