The Marketers Black Book of Forbidden Knowledge.
Book Description HTML
Finally, the one missing ingredient in your marketing efforts is revealed. You see, I decided if I ever did figure this thing out, I wasn't going to keep it to myself forever. So the time has come, I'll hand you the key that unlocks the secret door. The one that you have been looking for. When you put the key in the lock, and pass thru the door, you'll never look back. I'm breaking all the rules and handing you the key. grab it and open the door before I change my mind.