When operating in the gray area of intellectual property law, it is necessary to carefully assess the legal risks associated with copyright. Here are some suggestions to help you sell your adaptation legally without infringing copyright: 1. **Understand copyright law**: First, learn in depth about the copyright laws of your country and region, including the duration of copyright protection, the fair use doctrine, and relevant case law. The fair use doctrine may allow you to make limited uses of copyrighted works in certain circumstances. 2. **Original adaptation**: Make sure your adaptation is sufficiently original. For example, you can make significant changes to the material, add new creative elements, or present the content in a completely new way. 3. **Get authorization**: If possible, try to contact the copyright owner of the original work to obtain authorization for the adaptation. This can help you legally use elements of the original work. 4. **Use public domain material**: Look for works that have entered the public domain for adaptation. Works in the public domain are no longer protected by copyright, so you can use them freely. 5. **Works with license agreements**: Use works that are released under open licenses, such as Creative Commons licenses. These works may allow you to make adaptations as long as you follow the specified terms of use. 6. **Distinctive Use**: Add a distinct personal style or theme to your adaptation to ensure that it is substantially different from the original work and reduce the risk of copyright infringement. 7. **Legal Consultation**: Before making any adaptation that may involve copyright issues, consult a professional intellectual property lawyer to ensure that your actions will not infringe on the copyrights of others. 8. **Record the creative process**: Keep records of the creation and adaptation process to prove that your work is original and independent. Always be cautious, respect intellectual property rights, and avoid infringement disputes. When creating and selling adapted products, make sure you follow relevant laws and ethical standards.