In this classic book, Margaret and her biologist husband (who did the illustrations for the book) write of a winter, and especially the elk, at a ranch in Jackson Hole. Olaus and Mardy alternate chapters, mixing tales of work as a field biologist with stories of life in the region, where they lived for 37 years. Olaus Murie, who was born in 1889 in Moorhead, Minnesota, was named the first president of the Wilderness Society in 1945. The Murie ranch is now a conservation center, run in cooperation with Grand Teton National Park.  (USW68, $24.95)