Hardcover books and paperback books were both bookbinding methods. The difference lay in the content, purpose, and price of the book. 1. Hardcover books usually contain more content and use high-quality paper and printing technology to make them more durable and easy to read. A paperback book usually only contained some text and table of contents, and rarely used a simpler and plain binding method. 2. Use: Hardcover books are usually used to publish official books, academic books, historical books, etc. to provide better visual effects and legibility. On the other hand, paperback books were more commonly used in novels, magazines, and other literary works, as well as books in daily life. 3. Price: Hardcover books are usually more expensive than paperback books because they need to contain more content, and some hardcover versions of classic works may be even rarer and more precious. The paperback book is usually cheaper than the paperback book but can be used for a variety of purposes. Hardcover books and paperback books were the two extremes of book binding. The main difference between them was the content, purpose, and price of the book.