This book is designed for a one-semester or two-semester course in international economics, primarily targeting non-economics majors and programs in business, international relations, public policy and development studies. It has been written to make international economics accessible to wide student and professional audiences. The book assumes a minimal background in microeconomics and mathematics and goes beyond the usual trade-finance dichotomy to give equal treatment to four 'windows' on the world economy: international trade, international production, international finance and international development. It takes a practitioner point of view rather than a standard academic view, introducing the student to the material they need to become effective analysts in international economic policy. The website for the text is found at http://iie.gmu.edu/.