Ranulph Fiennes has travelled to the most dangerous and inaccessible places on earth, almost died countless times, lost nearly half his fingers to frostbite, raised millions of pounds for charity and been awarded a polar medal and an OBE. He has been an elite soldier, an athlete, a mountaineer, an explorer, a bestselling author and nearly replaced Sean Connery as James Bond. In his autobiography he describes how he led expeditions all over the world and became the first person to travel to both poles on land. He tells of how he discovered the lost city of Ubar in Oman and attempted to walk solo and unsupported to the North Pole - the expedition that cost him several fingers, and very nearly his life. His most recent challenge was scaling the north face of the Eiger, one of the most awesome mountaineering challenges in the world. Sir Ranulph Twisleton-Wykeham-Fiennes OBE, 3rd Baronet, looks back on a life lived at the very limits of human endeavour