Why marketers should read this book. 80% of all products introduced, is withdrawn from the market within two years. Annually over 60% of all advertising spending in the US alone, is wasted money. Marketers do a bad job? Yes and no. All marketers understand that you need to focus on the reward a product gives, rather than focus on the function of the product. But what they don't know is that it is the pleasure coming from an intrinsic reward that drives our behavior. The book teaches it.