Regarding the search: proceed with caution. Respect intellectual property. The authors and publishers spent years compiling this knowledge. If you cannot afford a physical copy, use your university library's inter-library loan or purchase a used edition online (sites like Abebooks or BookChor often have it for less than a cup of coffee).
Unlike micro or macro theory books, a history of economic thought is a story. It is a narrative of ideas clashing—deductive reasoning vs. historical observation, laissez-faire vs. state control. Lokanathan structures this narrative into digestible epochs. a history of economic thought by v lokanathan pdf