Over a ten-year period, Ira Gitler interviewed more than fifty of the major figures in jazz history to preserve for posterity their recollections of how jazz moved from the big band era in the late 1930s and 1940s into the modern jazz period. The musicians interviewed recreate their own experiences and also evoke the legendary figures of bop who were especially influential in its development but were rarely or never recorded, people like Clyde Hart and Freddie Webster.