In this powerful, eerily convincing fictional speculation on the assassination of  John F. Kennedy, Don DeLillo chronicles Lee Harvey Oswald’s odyssey from  troubled teenager to a man of precarious stability who imagines himself an agent  of history. When “history” presents itself in the person of two disgruntled CIA  operatives who decide that an unsuccessful attempt on the life of the president will  galvanize the nation against Communism, the scales are irrevocably tipped.