Adam Smith 
The Wealth of Nations: An Inquiry into the Nature and Causes of the Wealth of Nations [EPUB ebook] 

The Wealth of Nations by Adam Smith  generally referred to by its shortened title 
The Wealth of Nations , is the 
magnum opus of the Scottish economist and moral philosopher Adam Smith. First published in 1776, the book offers one of the world’s first collected descriptions of what builds nations’ wealth, and is today a fundamental work in classical economics. By reflecting upon the economics at the beginning of the Industrial Revolution, the book touches upon such broad topics as the division of labour,  productivity, and free markets.
The Wealth of Nations was published in two volumes on 9 March 1776 (with books I–III included in the first volume and books IV and V included in the second), during the Scottish Enlightenment and the Scottish Agricultural Revolution. It influenced several authors and economists, such as Karl Marx, as well as governments and organizations, setting the terms for economic debate and discussion for the next century and a half.
For example,  Alexander Hamilton was influenced in part by 
The Wealth of Nations to write his 
Report on Manufactures, in which he argued against many of Smith’s policies. Hamilton based much of this report on the ideas of Jean-Baptiste Colbert, and it was, in part, Colbert’s ideas that Smith responded to, and criticised, with 
The Wealth of Nations.