Author Dee Molenaar covers geology, glaciology, and climate; early climbs dating before 1900; the pioneering efforts on over 35 routes in winter and summer; notable summit climbs; mountain tragedies on the steep slopes; and the guides who have led summit seekers over the years. For the 40th anniversary edition new information includes more recent ascents, rescues, mountain guides, and climbing trends; updated statistics through 2010; and a new foreword by famed climber (and former Rainier guide) Ed Viesturs.