I want to know one thing. If I promote a certain book on my site...let's say fat loss, do I get comission from amazon only when people buy the fatloss book? Or will I get comission even if they buy something unrelated but as long as they have my cookie? Do I get comission only from people who will register at amazon or even if I refer already registered people? What do I have to do to promote a certain book on my blog, but get comission from any other products people might buy when they go to book link? I mean from white hat side of view.