Sun Tzu is a honorific title bestowed upon Sūn Wu (c. 544-496 BC), the author of The Art of War, an immensely influential ancient Chinese book on military strategy.

He is also one of the earliest realists in international relations theory. In the author's name, Sūn Wu, the character wu, meaning "military", is the same as the character in wu shu, or martial art. Sun Wu also has a courtesy name, Chang Qing (Cháng Qīng).

A widely known voice of esoteric ideas, Mitch Horowitz is a writer-in-residence at the New York Public Library, lecturer-in-residence at the University of Philosophical Research in Los Angeles, and the PEN Award-winning author of books including Occult America; One Simple Idea: How Positive Thinking Reshaped Modern Life; and The Miracle Club: How Thoughts Become Reality. Mitch introduces and edits G&D Media's line of Condensed Classics and is the author of the Napoleon Hill Success Course series, including The Miracle of a Definite Chief Aim, The Power of the Master Mind, and Secrets of Self-Mastery.