Nick Shay and Klara Sax knew each other once, intimately, and they meet again in the American desert. He is trying to outdistance the crucial events of his early life; she is an artist who has made a blood struggle for independence.<P><I>Underworld</I> is a story of men and women together and apart, seen in deep, clear detail and in stadium-sized panoramas, shadowed throughout by the overarching conflict of the Cold War. It is a novel that accepts every challenge of these extraordinary times -- Don DeLillo's greatest and most powerful work of fiction.