This is not just a self-help book. It's a classic Transactional Analysis's book written in the early seventieths that brings exercises and experiments from Gestalt, that will help you answer questions like: "Who am I?" and "What am I doing here?"
It's a very easy reading book which presents the TA theory in a clear way which can be understood by everybody. According to Eric Berne, creator of Transactional Analysis, the theory could be understood by an 8 year old child.
I'm a psychotherapist and I use TA every day in my life and in my practice with clients to help them make the changes they want. I recommend this book to all my clients, which help them on the process of psychotherapy. They enjoy the exercises that are very easily done. For them I make a special reference to chapter 5, where the authors present an easy explanation on how we become the way we are and the origin of the internal dialogue, helping people to make new decisions.
It's an amazing book that I would recommend to anyone interested in having a better life with oneself and with others.