These Disney knowledge books are great for exploring the world of animals and nature. To use them, simply open the pages and start reading. When handling, make sure your hands are clean to avoid further soiling the covers. Since the books are old and the text blocks are a bit tanned, try not to bend the pages too forcefully to prevent damage. To maintain them, store them in a dry and cool place away from direct sunlight. If you notice any loose pages, you can use some gentle glue to fix them, but be careful not to get glue on the text.