Non-fiction books are written works that present factual information about real events, people, or concepts. They aim to inform, educate, or provide insights into various subjects, such as history, science, self-help, and biographies. Unlike fiction, which tells imaginative stories, non-fiction relies on facts and evidence to convey its message. These books can take many forms, including textbooks, memoirs, and documentaries. They often include research, interviews, and data to support their claims. Non-fiction books are valuable resources for readers seeking to learn more about the world around them or to gain practical knowledge in specific areas.