This 28 - volume encyclopedia set is a great resource for gaining knowledge. You can use it for general reading to learn about various topics, or for more in - depth research. When handling the books, be gentle to avoid further damage to the covers and spines. To keep them in good condition, store them in a dry and cool place away from direct sunlight. If you notice any new stains, you can use a soft, dry cloth to gently wipe the surface. Also, make sure to handle the pages carefully to prevent tearing.