Psycho-Cybernetics is a self-help book written by Maxwell Maltz. It explores the concept of cybernetics, which is the study of control and communication in both machines and living organisms. The book focuses on how individuals can use their minds to achieve success and happiness in various aspects of life, including personal relationships, career, and overall well-being. Maltz provides practical techniques and exercises to help readers reprogram their minds and overcome self-limiting beliefs. The updated and expanded edition includes additional insights and examples to make the concepts more relevant to modern readers.