The "Crime" category of books typically includes stories that revolve around criminal activities, investigations, and the pursuit of justice. These books may feature detectives, police officers, or other law enforcement officials as main characters, as well as criminals and their victims. Crime novels often involve suspenseful plot twists and turns, as well as complex character development. The genre can encompass a wide range of subgenres, including mystery, thriller, and true crime, and may explore themes such as morality, ethics, and the human condition. Overall, the "Crime" category offers readers a thrilling and engaging look into the darker side of human nature and the justice system.

The "Spy" category of books typically involves stories of espionage, covert operations, and intelligence gathering. These books often feature protagonists who are highly skilled and trained in the art of espionage, and who work for various government agencies or private organizations. The plots are often complex and involve intricate schemes and high-stakes missions, with the threat of danger and betrayal always looming. Spy books can be set in various time periods and locations, and can range from action-packed thrillers to more cerebral and nuanced stories of espionage.

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