This text presents an easy-to-read introduction to the basic ideas and techniques of game theory. It begins by discussing combinatorial gamesa topic often neglected in other textsand then moves to two-person zero-sum games. The final chapter explores the concepts and tools of non-zero-sum games and games with more than two players. Suitable as a textbook, for self-study, and as a reference, this introduction prepares readers for more advanced study of game theorys applications in economics, business, and the physical, biological, and social sciences.