This book introduces the basic rules and concepts of go with four games played on 9x9 boards. Through these games the reader learns how territory is formed, how to determine the final score, how to capture stones, what are the conditions for a group to live and not be captured, and how to fight a ko. The remainder of the book covers the basic opening principles and tactics. Interspersed between chapters are short essays on the history of the game, professional tournaments in Japan, China, Korea, and the western world, go equipment, computer go, and other topics.