Grades 4-8. This cleverly designed picture book uses just the right balance of information and explanation to guide students through both the global history of currency and the application of market pressures on exchange methods. Each three-page chapter takes another chronological step forward through the history of money in a variety of cultures, from ancient Egypt and Mesopotamia to modern Europe, beginning with a burgeoning barter system where goods and services are exchanged directly for other goods and services all the way to contemporary concerns about inflation and variable exchange rates. Of particular note is the cogent and accessible way Kitamura’s cartoonish drawings help illustrate Jenkins’ discussions of money’s symbolic worth and the ways accounting led to the development of written language. Jenkins’ straightforward, breezy tone and simple examples help make a confounding topic just a little clearer. Some of the math toward the end is tricky, but that only helps to illustrate the importance of understanding computation to be able to grasp everyday economics.