Product Description A book for the business man who already knows the theory of letter writing but is looking for more effective says of putting it into practice. It shows successful ways of selling all manner of products through proper advertising. About the Author The author of over a dozen books, Robert Collier was decades ahead of his time in writing down ways for man to improve his lot in life. He wrote "Secret of the Ages" during an active and successful life developed upon basic ideas which opened up new vistas of living for countless multitudes of people. Brought up to be a priest, he worked as a mining engineer, an advertising executive and a prolific writer and publisher.
