N or M? Book by Agatha Christie

N or M? by Agatha Christie is a mystery novel featuring detectives Tommy and Tuppence Beresford. Set during World War II, the couple is tasked with uncovering a German spy ring operating in England. Posing as guests at a seaside hotel, they investigate the suspicious activities of various individuals, trying to identify the enemy agents hidden among them. The novel combines espionage, suspense, and Christie’s trademark twists, as Tommy and Tuppence work together to solve the case.