Another thought: sometimes universities provide access to textbooks through interlibrary loans or other means. If the user is affiliated with an institution, that could be a pathway. Also, mentioning public library services that offer e-books could be helpful.
The user might not be aware of the legal aspects or the ethical considerations here. They might just want to access the book for learning purposes. I should acknowledge their request but guide them towards legitimate sources. fundamentals of computer graphics fifth edition pdf link
First, I should remember that providing a direct download link to a copyrighted PDF might be against policies and could infringe on copyright laws. The publisher, CRC Press, and authors usually have rights over their works. So sharing a link without permission isn't advisable. that could be a pathway. Also