High
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High Citadel,
This story takes up the South American coup-d'etat idea and puts the main protagonists in an aeroplane doomed to crash-land on some inhospitable mountain plateau high in the Andes. The event is not just a bit of bad luck for all involved but also an attempt to kill off an important political leader.

Tim O'Hara is the hapless pilot of the plane, innocent except of being desperate for the charter that ends in his battle for survival.

The mountains are ferociously cold and the air so thin that just walking is an olympian effort. While one group of survivors attempts to cross the peaks via a deadly, snow-covered pass, the other must stall the armed group of communist soldiers working to kill them all once they've managed to cross a strategicly placed river in torrent. Luckily this isn't so easy and the remaining passengers, and the plane's pilot, have time to put into action several ingenious ideas to prolong their survival until help arrives.

There are despicable and admirable characters on both sides, and the level of tension that builds as the story unfolds will keep you reading until the explosive climax.