No lightweight, Ehrlich wandered, mostly alone, by boat, helicopter, plane, and dogsled over seven seasons in Greenland. This account of her travels in the region reflects her insight, knowledge, and deep appreciation of the people and barren landscapes of the north. A first-rate writer and philosopher, she interweaves the story of her own peregrinations with the story of Greenland-born Knud Rasmussen, the Arctic explorer who established a trading base at Thule with Peter Freuchen; and the result is a profound, exhilarating book.  (ARC107, $14.95)