At the transnational level, a variety of private policing forms have emerged to protect new sites of private authority within global governance, as well as to assume security responsibilities that were previously the sole preserve of state agents. Operating across the world's most hostile regions, the transnational security consultancy industry provides a compelling example of this phenomenon. From Colombia to Iraq, leading firms deploy a wide-range of specialised security services to protect client interests in high-risk environments. In this detailed examination and theorisation of transnational security consultancy, Conor O'Reilly presents a timely critique of an industry that is well-placed to harness contemporary global security anxieties. Mass casualty terrorist attacks such as 9/11, corporate scandals such as Enron, ongoing conflicts in Afghanistan and Iraq, and the insecurity surrounding pandemics have all lent further impetus to the transnational ascendancy of leading...