These vintage books are great for collectors or those interested in metallurgy history. When using them, handle them gently as they're old and may be fragile. Avoid getting them wet or exposing them to direct sunlight for long periods to prevent further damage. To maintain them, store them in a cool, dry place on a flat surface. If you need to move them, hold them firmly by the spine. Since the binding of 'Metal Castings' is starting to loosen, be extra careful when opening and closing it.