Four oldish treats from the 1950s and 1960s. I suppose they're all sort of joined up by being "thrillers" in unconventional settings. But that's pretty spurious - they're really joined up by being four books that caught my eye recently; there's not much more pattern than that.
High Citadel (1965), by Desmond Bagley, is a nice combination of survivalist horror and siege-porn. A small plane carrying a motley group of passengers is hijacked, and makes a crash-landing in the Andes. It turns out one of the passengers is politically important (the ex-President of a mythical South American country) and a group of Communist insurgents are keen to see him disposed of and out of the way.
But the Commies didn't count on American derring-do! The plane's captain, a former POW in Korea, shrugs off his burgeoning alcoholism and assembles the remaining passengers into a rag-tag group of freedom fighters. It is more fun (and less preachy) than it seems, as the team defend their mountain perch with a combination of medieval and jury-rigged weapons. And, in parallel, others try the murderous march over the mountains to get help - but with almost no supplies.
Although it tries, this isn't exactly a soaring novel of human triumph - the characters are mostly one-dimensional and the situation escalates far past the ability to suspend disbelief. But the detail is enjoyable, in a Robinson Crusoe Goes to War kind of way.