More than half a century ago, Vance Packard shocked readers by revealing how advertisers sought to influence consumers, often without their knowledge. What was true in 1957 remains true today - with one crucial difference. Aided by brain imaging specialists, neuroscientists and cognitive psychologists, advertisers, marketers and retailers are developing persuasion techniques far more sophisticated thatn Packard could have dreamt of. This is the inside story of this new brain science.