N or M?: A Tommy and Tuppence Mystery

During World War II, as Britain battles the Luftwaffe, a more insidious danger lurks within—the presence of Nazi agents disguised as civilians.

Amidst mounting tension, the intelligence service enlists Tommy and Tuppence Beresford as unlikely spies. Their task: identify a man and a woman among the diverse guests at Sans Souci, a coastal hotel. However, this mission is far from leisurely; N and M, dangerous murderers, have eliminated a top British agent, casting doubt on everyone’s allegiance.