This book explores the development of currency around the world, its impact on countries, and its electronic usage today. Fascinating details on ancient forms of payment, as well as the process of minting coins provides a solid introduction to trade and exchange. Series Information: "Inventions That Shaped the World" introduces young readers to revolutionary inventions, and emphasizes the impact the inventions had upon life at the time of their creation and beyond. Also explored is the featured invention”s cultural significance, as well as the patterns of change that resulted from its origination. Chapters cover topics such as life before the invention, the need for the invention, its development, its influence upon culture, its evolution, and a biography on the inventor.