A box set of the worlds best motivational classics!The worlds most popular books to achieve success and build a fortune (collection of four books) includes the following:1) How to Win Friends and Influence People2) The Power of Your Subconscious Mind3) The Richest Man in Babylon4) Think and Grow Rich About the Author Dale Carnegie was an American writer and lecturer. He is credited with developing courses in the fiels of self-improvement, corporate training, public speaking and interpersonal skills.Joseph Murphy has written over 30 books. His most famous work,The Power of Your Subconscious Mind, which was first published in 1963, became an immediate bestseller.George Samuel Clason was an American author most often associated with his bookThe Richest Man in Babylon.Napoleon Hill was an American self-help author best known for his bookThink and Grow Rich.