If you must have it free: Go to Google Scholar or ResearchGate . Search for papers written by J. Ravichandran (IIT Kharagpur). Email a polite request: "Professor, I am using your textbook for my course. Do you have an errata or a sample chapter PDF?" You would be surprised how often authors share their own work.
by Dr. J. Ravichandran is a copyrighted work and is not legally available for free download in its entirety. Amrita Vishwa Vidyapeetham If you must have it free: Go to
: For the complete, authorized version, it is available for purchase or rent on and through Book Highlights Practical Focus If you must have it free: Go to