Lawrence Epstein's The Haunted Smile tackles a subject both poignant and delightful: the story of Jewish comedians in America. For the past century and more, American comedy has drawn its strength and soul from the comic genius of Jewish performers and writers. An incomplete listing of names makes the point: The Marx Brothers, Jack Benny, Fanny Brice, George Burns, Milton Berle, Jackie Mason, Joan Rivers, Rodney Dangerfield, Mel Brooks, Alan...