In business -- or in any endeavor -- ambition is the spirit of onward and upward, of striving for something worth achieving. It is the driving force behind all great experiments and risk-takings, triumphs and failures. For authors Jim Champy and Nitin Nohria, it is also the instinctive quality that makes the difference between mere management and leadership. Drawing from original interviews with contemporary figures from many walks of life -- including...