New York City native and gifted pianist George Gershwin blossomed as an accompanist before his talent as a songwriter opened the way to Broadway, where he fashioned his own brand of American music. He composed a long run of musical comedies, many with his brother Ira as lyricist, but his aspirations reached beyond commercial success. A lifetime learner, Gershwin was able to appeal to listeners on both sides of the purported popular-classical...