Monetary phenomena define the contours of the contemporary global economy. This is a recent development, and it will transform the study of international political economy (ipe). Two excellent new books, The Geography of Money, by Benjamin Cohen, and Mad Money, by Susan Strange, will frame, support, and provide the point of departure for scholars addressing this vital question. Ultimately, however, and perhaps necessarily, these books raise more questions than they answer. But they do suggest in which direction the most promising avenues of investigation point--toward the study of the unique interconnections between the ideas, material interests, and institutions associated with the management of money. Those relationships are profoundly consequential for politics and demand the renewed attention of contemporary scholars of international relations and political economy.