He was a friend of James Joyce, Pablo Picasso, e.e. cummings, John Dos Passos, Irving Berlin, and F. Scott Fitzgerald--and the enemy of Ezra Pound, H.L. Mencken, and Ernest Hemingway. He was so influential a critic that Edmund Wilson declared that he had played a leading role in the "liquidation of genteel culture in America." Yet today many students of American culture would not recognize his name. He was Gilbert Seldes, and in this brilliant biographical...