Gluck listens deeply to the uneasy tension between this group's driving rhythmic groove and the sonic and structural openness, surprise, and experimentation they were always pushing toward. There he hears-and outlines-a fascinating web of musical interconnection that brings Davis's funk-inflected sensibilities into conversation with the avant-garde worlds that players like Ornette Coleman and John Coltrane were developing. Going on to analyze the little-known experimental groups Circle and the Revolutionary Ensemble, Gluck traces deep resonances across a commercial gap between the celebrity Miles Davis and his less famous but profoundly innovative peers. The result is a deeply attuned look at a pivotal moment when once-disparate worlds of American music came together in explosively creative combinations.