In Jon Krakauer's book, Into Thin Air, he talks about the mount everest diasaster of 1996.
"When Jon Krakauer reached the summit of Mt. Everest in the early afternoon of May 10, 1996, he hadn't slept in fifty-seven hours and was reeling from the brain-altering effects of oxygen depletion. As he turned to begin hid long dangerous descent from 29,028 feet, twenty other climbers were still pushing doggedly towards the top. No one had noticed that the sky had begun to fill with clouds. Six hours later and 3,000 feet lower, in 70-knot winds and blinding snow, Krakauer collasped in his tent, freezing, hallucinating from exhaustion and hypoxia, but safe. The following morning he learned that six of his fellow climbers hadn't made it back to their camp and were in a desperate struggle for their lives. When the storm finally passed, five of them would be dead, and the sixth so horribly frostbitten that his right had would have to be amputated.

I think this book is an amazing survival story and a true insight into the dangers of climbing Mt. Everest.