This document provides an overview of international economics. It defines international economics as the study of economic interactions between countries and the effects of globalization and international issues on economic activity. The document outlines some key concepts in international economics including gains from trade, patterns of trade, balance of payments, and foreign direct investment. It also describes the theoretical and descriptive aspects of international economics, discussing pure and monetary theories as well as the institutional environment for international transactions. Overall, the document introduces the broad field of international economics and some of its fundamental concepts.