In the third volume of the Napoleon Hill Success Course series, PEN Award–winning historian and New Thought voice Mitch Horowitz explores the full-range of self-development ideas that appear throughout Hill's work. In Secrets of Self-Mastery, Mitch supplies new insights and updates on the techniques that make you more confident, effective, attractive, charismatic, astute, and creative, including: how to use theatrical techniques to reshape your persona; benefiting from the psychology of clothing; how to allow only the right people and influences into your life; what brain science reveals about improving self-confidence; the can't-miss way to prepare and deliver a compelling sales talk or public address; how to manage depression and anxiety on the path to self-development; and much more. This is the book that finally distills and prescribes exactly what Hill grasped about human nature, and how recent breakthroughs and insights make it all the more compelling and useful.