Secret Adversary, The: HarperCollins Publishers

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

“It’s tempting to say that Agatha Christie is a genius and let it go at that, but the world’s had plenty of geniuses. Agatha Christie is something special.” —Lawrence Block, New York Times bestselling author

Read the official edition of Agatha Christie’s first Tommy and Tuppence mystery, featuring the famous detective duo navigating romance and mystery in the wake of WWI

Tommy and Tuppence, two people flat broke and out of work, are restless for excitement. They embark on a daring business scheme—Young Adventurers Ltd.—“willing to do anything, go anywhere.”
But their first assignment, for the sinister Mr. Whittington, draws them into a diabolical, political conspiracy. Under the eye of the elusive, ruthless Mr. Brown, they find themselves plunged into more danger than they ever imagined.
One of mystery’s most memorable sleuthing duos, Tommy and Tuppence lead readers down a harrowing maze of secrets, lies, and death in The Secret Adversary.

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