Noir fiction is a genre characterized by its dark themes, moral ambiguity, and complex characters. It often features a cynical protagonist, typically a detective or anti-hero, who navigates a world filled with crime, corruption, and betrayal. The narrative style is usually gritty and realistic, reflecting the harsh realities of life. The genre emerged in the early 20th century, influenced by hardboiled detective stories and German Expressionism. Notable works include Dashiell Hammett's "The Maltese Falcon" and Raymond Chandler's "The Big Sleep." Noir fiction has also influenced film, leading to the development of the film noir style in cinema.