Every year thousands of people head into New Zealand mountain ranges, pitting themselves against the elements and the environment.
Sometimes they are under prepared and ill equipped and don't make it out alive. And sometimes they are just unlucky.
All of those scenarios are explored in a new book about some of the most daring rescues in New Zealand mountaineering history.
Its author, Phillip Melchior, former chairman of volunteer Land Search and Rescue, talks with Kathryn Ryan.