These books are great for learning about Chinese history and politics. To use them, simply open to the page you want to read. Since they're a bit old and have some wear, handle them gently to avoid further damage. When not in use, store them in a dry place away from direct sunlight to prevent more soiling and sunning. If the loose covers bother you, you can take them to a professional bookbinder for repair. Enjoy exploring the valuable knowledge inside!