If you own this signed paperback of 'Mission Impossible', it's a great collectible to display on your bookshelf. When handling it, make sure your hands are clean to avoid further staining. To prevent more wear and tear, keep it away from direct sunlight and humidity. You can store it in a book sleeve or a box. If you notice any loose pages, you can use archival - quality glue to fix them gently. Remember, it's a precious item, so handle it with care.