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By 1916, Dale conducted a sold out lecture at [[Carnegie Hall]], which influenced his decision in 1919 to change the spelling of his last name in honor of the steel magnate, [[Andrew Carnegie]], and easier for others to remember. Carnegie's first collection of his writings was "Public Speaking: a Practical Course for Business Men" (1926), later entitled "Public Speaking and Influencing Men in Business" (1932). In 1936, [[Simon &amp; Schuster]] published "How to Win Friends and Influence People". The book was a bestseller from its debut. By the time of Carnegie's death, the book had sold five million copies in 31 languages, and there had been 450,000 graduates of his Dale Carnegie Institute. It has been stated in the book that he had critiqued over 150,000 speeches in his participation in the adult education movement of the time.