I need to consider copyright laws here. Providing or promoting a method to download a copyrighted book without permission is illegal. So, I should make it clear that downloading a free PDF of the entire book from unauthorized sources isn't legal. However, maybe the user is looking for alternatives to obtain the book legally.
Another angle: the user might be in a region with different copyright laws. However, as an AI, I need to provide a general response, so it's safest to advise against any unauthorized distribution. I need to consider copyright laws here
Wait, but sometimes older books might be in the public domain. Let me check. "Pointers in C" was published in the 1990s, but since Yashwant Kanetkar is still alive (as of recent years), the copyright would still apply. So even if it's several decades old, it's not in the public domain. However, maybe the user is looking for alternatives