Alexander Klein, author of a spy novel that became a Hollywood movie, died Aug. 13 at his Manhattan home. He was 83.Klein wrote “The Counterfeit Traitor” (1958), based on the life of Swedish oil executive Eric Erickson, who posed as a pro-Nazi businessman to spy for the Allies during WWII. The 1962 movie version starred William Holden and Lilli Palmer. Klein also wrote speeches and screenplays and edited books on social and urban issues, including “The Empire City'” (1955) and “Dissent, Power and Confrontation” (1972). He worked as an advertising and public relations executive and taught writing at Fordham U. and City College of New York, his alma mater.