Reinsurance is a financial market that trades in the risk of unpredictable and devastating disasters - such as Hurricane Katrina, the Tohoku earthquake and tsunami, and the terrorist attacks on the World Trade Centre. Such disasters are increasing in both frequency and severity, with the cost of their losses mounting rapidly. Reinsurance insures insurance companies, enabling them to pay claims arising from these losses. It is thus a market mechanism that is a critical part of the social and economic safety net, helping to pick up the pieces after disasters. Yet, how is the risk of such disasters calculated and traded in a global market? This book brings to life the reinsurance market through vivid real-life tales that draw from an ethnographic, "fly-on-the-wall" study of the global reinsurance industry over three annual cycles. The authors shadowed underwriters around the world as they traded risks through multiple disasters. For instance, this book takes readers into the desperate hours of pricing Japanese risks during March 2011, while the devastating aftermath of the Tohoku earthquake is unfolding.