These Mary Stewart novels are great for reading anytime. When you're using them, handle 'The Crystal Cave' with extra care because its binding is broken and fragile. To keep these books in good shape, store them in a dry and cool place. Avoid exposing them to direct sunlight for long periods as it can fade the covers. If there's a bit of dust on the books or dust jackets, you can gently wipe them with a soft cloth. When you're done reading, place them back on the shelf upright to prevent any damage to the bindings. Enjoy exploring these wonderful stories!