Dashiell Hammett (1894–1961) was an American writer whose eight years as an operative for the Pinkerton National Detective Agency, beginning in 1915, grounded his fiction in gritty realism and informed his pioneering role in hard-boiled detective stories. His breakthrough came with Red Harvest (1929), followed by The Maltese Falcon (1930). The novels introduced Sam Spade and became the foundation for the film noir tradition, with its terse prose, morally ambiguous characters, and urban settings. Drawing directly from his Pinkerton experiences, including shadowing strikebreakers and monitoring union activity, Hammett elevated detective fiction into literary modernism, favoring realistic dialogue, intricate plotting, and flawed protagonists. Beyond novels, he wrote for Hollywood and later became active in left-wing politics, enduring imprisonment in the 1950s for refusing to cooperate with the House Un-American Activities Committee (HUAC), which led to his blacklisting. Today, Hammett is celebrated as the father of the genre, with his enduring legacy seen in iconic characters like Sam Spade and Nick and Nora Charles and in the countless noir films and authors he inspired.