Crime novels and mystery novels are often used interchangeably, but they have distinct characteristics. Crime novels typically focus on the criminal aspect, including the planning and execution of a crime, the investigation process, and the pursuit and capture of the criminal. These novels often delve into the psyche of both the criminal and the investigator, exploring themes of justice, morality, and human nature.

On the other hand, mystery novels primarily revolve around solving a puzzle or a crime. The emphasis is on the intellectual challenge of uncovering clues and solving the mystery, often with a detective or amateur sleuth as the protagonist. While crime novels can include mysteries, not all mystery novels are necessarily crime-focused.

Some of the best crime novels masterfully blend elements of both genres, offering readers a compelling narrative that keeps them guessing until the very end. These novels often feature complex characters, intricate plots, and unexpected twists that keep readers on the edge of their seats.