The book is divided into two logical parts:

If you search for the keyword, you will notice the peculiar inclusion of the word "Xavier." Who is Xavier, and why is his name attached to OP Tandon’s PDF?

After investigating multiple online forums (Reddit, Telegram, and academic Discord servers), three theories emerge:

Even if you find a real PDF, the quality is often abysmal:

A: Look for the 2024 or 2025 Revised Edition. The cover is usually orange and white. Avoid the green cover (that is the 2010 edition).

In the world of pirated textbooks, uploaders often add random names (like "Xavier," "Arihant Expert," or "McGraw Hill Edition") to make their file stand out in search results or to avoid copyright detection algorithms. The name "Xavier" likely has no real association with OP Tandon or the publisher (GRB Publications).