George Gershwin is one of the giants of American music, unique in that he was both a brilliant writer of popular songs (""Swanee,"" ""I Got Rhythm,"" ""They Can't Take That Away From Me"") and of more serious music, including ""Rhapsody in Blue,"" ""An American in Paris,"" and ""Porgy and Bess."" Now, in The George Gershwin Reader, music lovers are treated to a spectacular celebration of this great American composer. The Reader offers a kaleidoscopic collection of writings by and about Gershwin, including more than eighty pieces of superb variety, color, and depth. There is a who's who of famo