These Hardy Boys mystery books are great for enjoying thrilling stories. To use them, simply sit back, relax, and start reading page by page. When handling the books, make sure your hands are clean to avoid adding more soiling. Keep them away from direct sunlight and moisture to prevent damage. If you want to store them, place them on a shelf in an upright position. And remember, don't bend the pages or put heavy objects on top of them. Enjoy these vintage mysteries!