We all have an internal voice that determines how we make decisions and view the world. We are either guided by our inner Child, Parent or Adult, and this has a huge impact on our relationships, family, work and life. In this classic book, one of the world's best psychiatrists, Thomas A. Harris, explains the fundamentals of Transactional Analysis and reveals how our interactions with others hold the key to understanding ourselves. It will teach you how the human mind operates, why we do what we do, and how to break old patterns in order to gain control of yourself and your future.