The Once and Future King

''Most Secret'' is a novel by Nevil Shute, written in 1942 but censored until 1945. It is narrated by a commander in the Royal Navy, and tells the story of four officers who launch a daring mission at the time when Britain stood alone against Germany after the fall of France. Genevieve is a converted French fishing vessel, manned by four British officers and a small crew of Free French ex-fishermen, armed only with a flame thrower and small arms.
Their task is as much psychological as military: to show the Germans that they will one day be beaten back.