"The Secret Adversary," Agatha Christie's debut thriller (1922), follows childhood friends Tommy Beresford and Tuppence Cowley—young, penniless, and hungry for adventure in post-World War I London. They launch "Young Adventurers Ltd," offering themselves for hire, and are soon recruited by British Intelligence to find missing secret documents linked to the sinking of the Lusitania. The papers, entrusted to a woman named Jane Finn, could plunge England into revolution. As the duo pursues clues, they face deception, kidnapping, and a shadowy mastermind known only as "Mr. Brown." Blending espionage, romance, and wit, the novel introduces Christie's beloved detective duo.
