This is a new, updated edition of Bruce Tremper's acclaimed book, now in its second edition and sixth reprint - published for the first time in the UK previous edition was 9780898868340 published by The Mountaineers Books in the US, with limited availability in the UK. The book is regarded as the most authoritative commentary on avalanche matters. Winter recreation off-piste, particularly in North America and Europe, has increased steadily over the years and so has the number of deaths caused by avalanches. As search and rescue teams are increasingly strapped for funding, self-education has become a larger necessity for snow-sport enthusiasts. This new edition of Bruce Tremper's seminal book is organised according to the structure of the American Avalanche Association classes and all chapters have been updated with the most recent data and techniques, and reviewed by peer experts.