Appointed by George W. Bush as the chairman of the Federal Deposit Insurance Corporation (FDIC) in 2006, Sheila Bair witnessed the origins of the financial crisis and in 2008 became-along with Hank Paulson, Ben Bernanke, and Timothy Geithner-one of the key public servants trying to repair the damage to the global economy. Bull by the Horns is her remarkable and refreshingly honest account of th…