Published in 2005, Freakonomics: A Rogue Economist Explores the Hidden Side of Everything was a surprise international bestseller. It saw New York Times journo Stephen J Dubner team with University of Chicago economist Steven Levitt to apply economic theory to bizarre subjects. They exposed cheating in the world of Sumo wrestling, and the relationship between the Ku Klux Klan and estate agents, to the tune of several million copies sold. Superfreakonomics followed last year. The film is getting a limited release in the States this November but as yet no British release date. Watch this space social warriors.