"Billy Boyle, a young Irish-American cop from Boston, has just made detective when the United States joins World War II. His 'Uncle Ike' -- Dwight D. Eisenhower -- has been chosen to command Army forces in Europe, and he wants billy to be his personal investigator. Billy, who had never left Boston before enlisting, is not so sure about his ability as a detective. But he dutifully sets off for London, where he'll be working with British Allies to catch a spy who threatens Operation Jupiter, the impending invasion of Norway."--Back cover.