If you own this rare book, here's how to handle it. First, when reading, use a bookmark instead of folding the pages to avoid further tearing. Keep it away from direct sunlight and high humidity as these can cause more yellowing and damage to the pages. To maintain its condition, store it in a cool, dry place. If you need to move it, hold it gently by the covers to prevent the binding from breaking down further. And remember, due to its age and fragility, handle it with extra care.