William Walker Atkinson (1862–1932) was an American author, lawyer, and influential writer on psychology, self-improvement, and New Thought philosophy. He wrote extensively on topics such as personal development, mental power, success, and human behavior. Through works like How to Read Human Nature: Its Inner States & Outer Forms, Atkinson explored ideas about personality, character analysis, and the relationship between thoughts and actions, leaving a lasting influence on early self-help literature.