The book "An Inquiry into the Principles of Political Economy (Part 2 of 2). An Essay on the Science of Domestic Politics in Free Nations. In Which the Matters of Population, Agriculture, Commerce, Industry, Money, Coins, Interest, Circulation, Banks are Especially Considered" is an important work by the famous author Steart, James, knight. The book dates back to the 18th century and is an in-depth analysis of various aspects of the economy of free nations, particularly in the area of economic relations between people, society and the state. This work examines issues of demography, development of agriculture, trade, industrial production, monetary relations, functioning of the banking system and other important components of the modern economy. The difference of this work lies in the deep analysis, high level of research and relevance of the proposed concepts. The book can be considered a key source for understanding the principles of political economy and its application in the modern world.