The book "Group Psychology and Self-Analysis" by the famous Austrian psychoanalyst Sigmund Freud is a fundamental work in the field of group psychology and psychoanalysis. In this book, Freud examines the specifics of psychological processes that occur in groups of people, and also analyzes the role of the ego in the formation and development of individuality. He reveals the interrelationships between the mental life of an individual and his mental processes in the collective, investigating how group dynamics affect self-awareness, behavior and interaction of individuals. This book is a must-read for anyone interested in psychology, sociology, or psychoanalysis.