????? Espionage, danger, and a daring duo on the trail of a deadly conspiracy. Before Miss Marple and Hercule Poirot, there was Tommy & Tuppence—Agatha Christie's most adventurous crime-solving couple. In The Secret Adversary, post–World War I Britain hides secrets far darker than peace-time promises. When Tommy and Tuppence stumble into a missing-persons case, they uncover whispers of international espionage, political intrigue, and a mysterious mastermind known only as Mr. Brown ???. Fast-paced, witty, and filled with Christie's signature plot twists, this is the dynamic debut of a detective duo that would go on to capture hearts worldwide ??. Why readers love this classic mystery: ? "A perfect mix of mystery and romance, with fast-paced twists and real stakes." ? "Tommy and Tuppence are an irresistible pair—witty, brave, and thoroughly charming." ? A fan favorite for lovers of Christie's thrillers and vintage spy stories ?? This edition includes: ?? Annotated content with historical context ?? A redesigned layout for seamless reading ?? Beautifully illustrated and formatted for Kindle ?? Join Tommy & Tuppence on their first case—download The Secret Adversary now and enter a world of danger, codes, and classic Christie suspense.