In 1963, Jim Whittaker became the first American to summit Everest via the South Col route. Roughly two weeks after Whittaker's achievement, Tom Hornbein and Willi Unsoeld, fellow American mountaineers on the same expedition, became the first climbers ever to summit the world's highest peak via the dangerous and forbidding West Ridge—a route on which only a handful of climbers have since succeeded.

This special fiftieth anniversary edition reintroduces the adventure in a larger format by members of the expedition, including leader Norman G. Dyhrenfurth and team doctor Jim Lester. In addition to a new foreword by Jon Krakauer, this volume also features a new preface by Hornbein along with a series of prefaces he wrote for earlier editions, including the original from 1965.