Thin Air by Michelle Paver

A spooky book discussion at an awesome pub. What more could you want?

From Goodreads:

The Himalayas, 1935

Kangchenjunga. Third highest peak on earth. Greatest killer of them all.

Five Englishmen set off from Darjeeling, determined to tackle the sacred summit. But courage can only take them so far - and the mountain is not their only foe.

As mountain sickness and the horrors of extreme altitude set in, the past refuses to stay buried. And sometimes, the truth won't set you free ...