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Nonfiction books are written works that present facts and real-life experiences, as opposed to fiction which presents imaginary events and characters. These books can be further divided into various subcategories such as educational books and biography books. Educational books focus on providing knowledge and information on a specific subject matter, often used for teaching or self-learning purposes. Biography books tell the story of a person's life written by someone else, they offer insights into the experiences and achievements of notable individuals. Nonfiction books are an essential resource for gaining a deeper understanding of the world around us, providing valuable information and perspectives on a wide range of topics. They serve as a source of inspiration, education, and entertainment for readers of all ages.