These books are great resources for anyone interested in Marxism. To use them, simply open and start reading. When handling, make sure your hands are clean to avoid adding more soiling. To maintain them, store them in a dry place away from direct sunlight to prevent further yellowing of the pages. If you need to transport them, use a sturdy book - bag to keep the bindings secure. Be careful when turning the hole - punched pages to avoid tearing.