N or M?: A Tommy and Tuppence Mystery: The Official Authorized Edition (Tommy & Tuppence Mysteries #3) [9780063397910]

Overview

TOMMY & TUPPENCE COMING SOON TO BRITBOX, STARRING ANTONIA THOMAS, JOSH DYLAN, AND IMMELDA STAUNTON

In this official edition of Agatha Christie's classic mystery set during the dark days of World War II, two most unlikely espionage agents, married couple Tommy and Tuppence Beresford, on the trail of a pair of Nazi spies who have murdered Britain’s top agent.

World War II is raging, and while the RAF struggles to keep the Luftwaffe at bay, Britain faces a sinister threat from “the enemy within”—Nazis posing as ordinary citizens.

With pressure mounting, the intelligence service appoints two improbable spies, Tommy and Tuppence Beresford. Their mission: to seek out a man and a woman from among the colorful guests at Sans Souci, a seaside hotel. But this assignment is far from an easy stroll along the promenade—N and M have just murdered Britain’s finest agent and no one can be trusted.

Mystery, adventure, romance, and classic Christie intrigue—join Tommy & Tuppence as they solve crimes and uncover secrets across five unforgettable mysteries.

• Read all five books in the series: The Secret Adversary, Partners in Crime, N or M?, By the Pricking of My Thumbs, Postern of Fate
• “Partners” in Crime: Follow Tommy & Tuppence over the years as they navigate mysteries and marriage on an international stage
• A Historical War Story: Perfect for lovers of WWI and WWII mysteries
• Read before you watch!: A brand new adaptation of Tommy & Tuppence is coming to Britbox September 2026