The "Political" category of books encompasses works that explore the theory, practice, and history of government and politics. These books may cover topics such as political ideologies, political systems, political institutions, political movements, and political leaders. They may also examine the relationship between politics and other areas of society, such as economics, culture, and international relations. Political books can be both informative and thought-provoking, offering readers insights into the complexities of the political world and the challenges of governing in a democratic society.

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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