Former SAS hero Andy McNab and eminent psychologist Professor Kevin Dutton are unlikely partners. As Oxford academic and bestselling author of 'The Wisdom of Psychopaths', Dutton has plenty of experience of psychopaths, but he'd never met anyone quite like McNab, decorated war hero and special forces warrior. And although they took very different paths on their roads through life, their personal stories are remarkably similar. Together they decided to explore the subject of the psychopathic condition using a unique combination of McNab's personal experiences of 20 years in the army and Dutton's ability to analyse them. In their words, McNab pulls the trigger, Dutton explains why the gun goes bang!