From Irving Berlin to Cy Coleman, from "Alexander's Ragtime Band" to "Big Spender," from Tin Pan Alley to the MGM soundstages, the Golden Age of the American song embodied all that was cool, sexy, and sophisticated in popular culture. For four glittering decades, geniuses like Jerome Kern, George Gershwin, Cole Porter, and Harold Arlen ran their fingers over piano keys, enticing unforgettable melodies out of thin air. Critically acclaimed writer Wilfrid Sheed uncovered the legends, mingled with the greats, and gossiped with the insiders. Now he's crafted a dazzling, authoritative history of...