"When Rhapsody in Blue premiered at New York's Aeolian Hall on February 12, 1924, most people couldn't wait for the evening to be over. The piece was scheduled near the end of a long program called "An Experiment in Modern Music." After two sluggish hours, the audience was bored, restless, and drenched in sweat due to the hall's broken ventilation system. But then, a lone clarinet pierced through the orchestra, fizzing upward like a fountain of champagne. Suddenly, everyone was riveted. For the next 17 minutes, George Gershwin, an unknown 26-year-old composer, caressed and pounded the piano at center stage,...