The Secret Adversary

"The Secret Adversary" is a detective novel written by Agatha Christie, first published in 1922. It is the first novel to feature her recurring characters Tommy and Tuppence Beresford, a dynamic duo of amateur sleuths.
The story is set in post-World War I London and follows Tommy and Tuppence as they stumble into a world of espionage, conspiracy, and danger. Desperate for adventure and in need of money, they agree to take on a mysterious assignment from a stranger, who tasks them with finding a missing woman named Jane Finn and locating a document known as the "The Secret Adversary."
As Tommy and Tuppence delve deeper into the investigation, they find themselves entangled in a web of intrigue involving secret societies, political radicals, and international espionage. With danger lurking around every corner, they must use their wits and resourcefulness to navigate the treacherous waters of espionage and uncover the truth behind the mysterious disappearance.
"The Secret Adversary" is a thrilling and fast-paced mystery that showcases Christie's talent for crafting intricate plots and memorable characters. It introduces readers to the charming and witty duo of Tommy and Tuppence, who would go on to appear in several more novels and short stories throughout Christie's career. The novel remains a beloved classic of detective fiction and a must-read for fans of Agatha Christie.