Since you found it an "interesting piece," I can provide some context on why this specific book is significant in the field of mechanical engineering, along with what you should look for if you are trying to find a legitimate copy.
That night, under a flickering tube light, Zayan didn’t sleep. He followed Ahmadul Ameen’s patient prose as if it were a novel. Chapter 1: Fundamentals of Thermodynamics. Chapter 3: The Ideal Cycle. Chapter 7: Compressor Types. refrigeration and air conditioning by ahmadul ameen pdf new