Crime fiction is a literary genre that focuses on the investigation of a crime, often involving a detective or amateur sleuth. The narrative typically revolves around a central mystery, such as a murder or theft, and explores the motives and actions of the characters involved. This genre often includes elements of suspense and tension, keeping readers engaged as they try to solve the mystery alongside the protagonist. Popular subgenres include hardboiled, police procedurals, and cozy mysteries, each offering a unique approach to storytelling and character development within the framework of crime.