Thin Air by Michelle Paver

The Himalayas, 1935. Kangchenjunga.

The sacred mountain. Biggest killer of them all. Five Englishmen set off from Darjeeling, determined to conquer the sacred summit.

But courage can only take them so far - and the mountain is not their only foe. As the wind dies, the dread grows. Mountain sickness.

The horrors of extreme altitude. A past that will not stay buried. And sometimes, the truth does not set you free.