Discover Your Infinite Capacity for Wealth In this authorized edition of Napoleon Hill's The Master-Key to Riches, the philosopher of success describes the seventeen principles of wealth, productivity, and happiness available to all men and women. For both newcomers and longtime followers of Napoleon Hill's work, The Master-Key to Riches is a vital guidebook to the time-proven steps that have transformed directionlessness or temporary defeat into enduring success. Narrated by popular voice of esoteric ideas Mitch Horowitz, The Master-Key to Riches will become your immediate and lasting companion on the journey to maximum self-potential. Authorized by the Napoleon Hill Foundation.