From his youthful second ascent of the north ridge of Mount Kennedy in the Yukon's Saint Elias Range, an in-and-out on skis for which he had not entirely learned how to ski, to a recent excursion across the Harding Icefield conceived under the influence of rain and whiskey, David Stevenson chronicles several decades of a life unified by a preoccupation with climbing. Reflective and literary, and also entertaining and funny, his accounts move across...