Bantam A1472 (1956)
John Dickson Carr gives an extraordinary answer to the riddle of why Napoleon never crossed the Channel...
The Grande Armée lay poised for invasion, a few short miles across the Channel from England. But Napoleon's men were being demoralized - a mysterious killer was moving among them - a killer who signed his murders "Captain Cut-Throat."
The Emperor's ruthless chief of secret police, Fouché, captured the British agent, Alan Hepburn. Under pain of death, Fouché ordered Hepburn to search out Captain Cut-Throat. Then he put his most beautiful spy on Hepburn's trail.