An Unsolved Mystery: Nick Carter's Government Case

Nick Carter Stories, No. 145, June 19, 1915 An Unsolved Mystery The President of the United States brings in Nick Carter to investigate spies working to undermine the U.S. coastal defenses. With the first World War looming, it has become vital to protect the country from saboteurs-or invasion-should the Kaiser and his allies choose to launch move against the country.