In 1986 Brian Keenan and John McCarthy were forced to take a journey without maps. For the next four years they were incarcerated in a Lebanese dungeon. From the blank outlook of a tiny cell, with only each other and a few volumes of an ancient American encyclopaedia to sustain them, they could only wander the wide open spaces of their imagination. To displace the ugly confines of their existence, they envisaged walking in the High Andes and across the wastes of Patagonia. Five years after their return Brian and John chose to travel together again to see how the reality of Chile matched their imagination and to revisit their past experiences. They journeyed by every means available through vast empty deserts, verdant plains and barren tundra. Between Extremes is the story of that journey which once more found them far from home, in an unfamiliar landscape, but which for the first time allowed them to live by their own rules.