A book is a collection of written or printed pages, typically bound together and protected by a cover. It can contain various types of content, including stories, information, or illustrations. Books are often categorized into genres such as fiction, non-fiction, and poetry, and they can be found in libraries, bookstores, and online platforms. Books have been a vital source of knowledge and entertainment for centuries. They can be read for pleasure, education, or research. Notable examples include classic literature like Pride and Prejudice by Jane Austen and scientific texts such as A Brief History of Time by Stephen Hawking.