I often refer to Nightingale's "The Strangest Secret" - so this is an official blog entry to enable a direct access for you. By all means, check out the page below - as he has spent some time making this available for us all to use.
Mark Victor Hansen - Official Site of the "Master of Mindset": "The Strangest Secret has sold over a million copies and is the only gold record ever achieved for the spoken word. Its message is simple, yet powerful … You become what you think about … and it became the basis for the Nightingale-Conant Corporation. Many thousands of people have attributed this recording with turning their lives around and helping them make their fortunes in the world.