Niall Ferguson's, The Ascent of Money, is an informative account of money. From debt and credit, which were indispensable even at the time of ancient Mesopotamia, to the French Revolution and its links to world financial history, to the Great Depression and the stock markets of our century, he details how money shaped the history of the world.
What Muhtar Kent says
I love books on economic observations. This is one of the best.