If I can't find legitimate sources, the best approach is to advise against illegal downloading and direct them to legal alternatives like online libraries, publishers, or contact the author directly for access. It's important to respect intellectual property rights and encourage ethical behavior.
Next, I should consider the possible legal issues. If the book is under copyright, distributing it for free without permission is illegal. I should inform the user about the legality of this request and maybe suggest alternative ways to access the content.
Additionally, I should be cautious not to provide links to any third-party websites that might host pirated content, as that could expose users to malware or phishing attempts. Emphasizing safety and legality is key here.