That's interesting, because Cialdini's classic Influence covers this same ground (http://www.amazon.com/Influence-Psychology-Persuasion-Business-Essentials/dp/0

That's interesting, because Cialdini's classic Influence covers this same ground (http://www.amazon.com/Influence-Psychology-Persuasion-Business-Essentials/dp/006124189X http://www.amazon.com/Influence-Psychology-Persuasion-Busine...). Has anyone read both books? I'm curious as to whether Superfreakonomics added anything over Cialdini's treatment.