"The Manual of Ski Mountaineering" by the Sierra Club (edited by David Brower) is a classic guide to winter mountain travel. Originally compiled to train WWII mountain troops in 1942,
it provides comprehensive information on techniques, equipment, and safety for navigating mountainous terrain on skis.
Chapters cover essential topics like warmth, shelter, equipment, snow conditions, avalanches, and first aid. Although some details on specific equipment may be dated due to technological advancements, the fundamental principles and knowledge remain valuable for both beginners and experienced ski mountaineers seeking to explore the winter wilderness.