2002 first edition hardcover with dust jacket and 800 pages in good secondhand condition. What does it feel like to walk off the edge of a map? To emerge dazed, dying yet triumphant, from the Amazon? Benedict Allen's anthology of human exploration ranges across various terrains - hot and cold deserts, mountains and plains, jungles and high seas - and presents the words of those who, through the centuries - be they Vikings or missionaries, conquistadors or botanists - have set off into 'the unknown'.