These history books are great for learning about different periods of world history. To use them, simply open to the page you want and start reading. You can read them cover - to - cover or jump to specific chapters. When handling the books, be gentle as they are old. Avoid getting them wet as it could damage the pages. Store them in a dry and cool place to prevent further fading and staining. If you want to clean the covers, use a soft, dry cloth. Don't try to repair the binding yourself as it could cause more harm. Enjoy exploring the world's past through these volumes!