These two classic French books are great for literature lovers. To use them, simply open and start reading. When handling, try to keep your hands clean to avoid adding more soiling. Store them in a dry place to prevent further foxing or damage. If you notice any loose pages, you can use some simple bookbinding tools to reinforce them gently. Don't worry too much about the existing writing on the pages as it doesn't affect readability. And be careful not to cause more tearing when turning the pages, especially those with creases and minor tears.