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 "Investigation" category of books typically involves stories that revolve around solving a mystery or crime. These books often feature detectives, private investigators, or other types of sleuths who use their skills and expertise to uncover clues, interview suspects, and ultimately solve the case. The investigation genre can include a wide range of sub-genres, such as police procedurals, cozy mysteries, and psychological thrillers, but all share a common focus on the process of uncovering the truth.

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