N or M?: A Tommy & Tuppence Mystery by Agatha Christie

“N or M?” is a detective novel written by Agatha Christie. It was first published in 1941 and is part of Christie’s popular series featuring the characters Tommy and Tuppence Beresford.

Set during World War II, the story revolves around Tommy and Tuppence, a married couple who are enlisted by British intelligence to help uncover a Nazi spy network operating in England. Codenamed “N” and “M,” Tommy and Tuppence go undercover and pose as guests at the Sans Souci Guesthouse in a seaside town.

As they settle into their roles and interact with the various guests, Tommy and Tuppence must decipher a series of cryptic clues to uncover the identities of the spies. The novel is filled with suspense, as they face the challenge of identifying who among the guests is working for the enemy while trying to stay one step ahead of danger.

Throughout the book, Christie skillfully introduces a cast of intriguing characters, each with their own secrets and potential motivations. As the investigation progresses, Tommy and Tuppence find themselves drawn deeper into a web of deception and treachery.

“N or M?” showcases Agatha Christie’s knack for creating intricate plots and surprising twists. The novel combines elements of espionage, mystery, and suspense, providing readers with an engaging and thrilling reading experience. It also offers an intriguing glimpse into the wartime atmosphere and the challenges faced by individuals working to protect their country.