If you've got this antique book, it's a piece of history to cherish. To use it, just gently open the pages and enjoy the stories inside. When handling, make sure your hands are clean to avoid adding more stains. As for storage, keep it in a dry and cool place away from direct sunlight. This will prevent the pages from yellowing further and the binding from getting more damaged. Also, be careful when turning the pages because the hinges are already torn. If you want to keep it looking presentable, you could consider getting it professionally restored, but that's up to you.