Tragedy is a genre of literature that explores the darker aspects of human nature and the human experience. It typically involves a protagonist who is faced with a series of challenges and obstacles that ultimately lead to their downfall or demise. Tragic stories often deal with themes of loss, grief, and the struggle to find meaning in a world that can be cruel and unforgiving. Despite their often bleak subject matter, tragic stories can be deeply moving and thought-provoking, offering readers a powerful glimpse into the complexities of the human condition.

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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