A book is a collection of written, printed, or illustrated pages bound together. It can be made of paper or digital formats, such as e-books. Books serve various purposes, including entertainment, education, and information dissemination. They can cover countless topics, from fiction and non-fiction to poetry and reference materials. Books are often categorized by genre, such as mystery, science fiction, or biography. They can be found in libraries, bookstores, and online platforms. Reading books can enhance knowledge, improve vocabulary, and stimulate imagination, making them valuable resources for people of all ages.