This is a really interesting book. It takes us through various case-studies of people who were 'true survivors' of extreme situations. For example, a man alone on his boat in the canary islands accidentally hits a whale late at night, sinking his ship. He manages to make it to his inflatable life-raft. From there he drifts across the Atlantic for over 60 days, alone, his only fresh water rain and condensation, before being found by a fisherman in the Caribbean. How did he manage to survive? And is there anything we can learn from his and other "deep survivor's" experiences?