A celebrated mountaineer and author searches for meaning in great escapades and explorations, recent and present. David Roberts, ‘veteran mountain climber and chronicler of ventures’ (Washington Post), provides spent his profession documenting voyages towards the most intense landscapes on the planet. In Limits from the Known, he shows on humanity’s-and his own-relationship to severe risk. Part memoir and component history, this reserve tries to create sense of why so many have dedicated their lives towards the eager about Limits from the Known pursuit of experience. In the wake of his medical diagnosis with throat tumor, Roberts seeks answers with sharpened fresh urgency. He explores his very own lifelong commitment to adventuring, as well as the social efforts of explorers throughout history: What specific types of courage and dedication did it take for Fridtjof Nansen to survive an eighteen-month trip from an archive ‘farthest north’ without supplies and an individual rifle during his polar expedition of 1893-96? What compelled Eric Shipton to come back, five times, towards the ridges of Mt. Everest, plotting the mountain’s most treacherous territory years before Hillary and Tenzing’s popular ascent? What drove Expenses Stone to dive 3,000 foot underground into North America’s deepest cave? What motivates the explorers we most admire, who are willing to embark on perilous journeys and press the limitations of the human body? And what’s the future of experience in a world we have mapped and trodden from end to end?