You do not have to resort to piracy to get a digital copy. Here are legitimate sources where you can buy the eBook or rent it:

RK Rajput is a legendary figure in Indian technical education. He has authored dozens of textbooks on thermodynamics, fluid mechanics, and IC engines. His writing style is characterized by:

Thermal engineering is the science of the future—from electric vehicle thermal management to space rocket propulsion. Invest in the right tools to learn it. RK Rajput wrote the map; whether you use a digital compass (PDF) or a paper map (Physical Copy), just ensure you start the journey.