Andrew Carnegie 
ABC of Money 

From the days of farmer’s bartering for bushels of corn to establishing the concept of credit, this practical guide gets at the root of the subject of money: why it exists and, more importantly, what money really is. THE ABC OF MONEY is an undiscovered gem offering a wealth of knowledge and Carnegie’s shrewd philosophies on the subject — a fascinating look at the history of "debased coin" and "greenbacks, " and the value of currency from one of the great American industrialists.