Think and Grow Rich: Original Version [Mp3 Audio] [Unabridged] (MP3 CD):

Be prepared, therefore, when you expose yourself to the influence of this philosophy, to experience a changed life which may help you not only to negotiate your way through life with harmony and understanding, but also to prepare you for the accumulation of material riches in abundance. Teaching, for the first time, the famous Carnegie formula for money-making, based upon the thirteen proven steps to riches.

Napoleon Hill's works examined the power of personal beliefs, and the role they play in personal success. "What the mind of man can conceive and believe, it can achieve" is one of Hill's hallmark expressions. How achievement actually occurs, and a formula for it that puts success in reach for the average person, were the promise of Hill's books.