I enjoyed virtually all of the Alistair McClean books, but that one stood out as a good general story, but not very accurate in terms of American railroad practice. I recall two things about the movie version, in particular which were the stack of short fire wood for the engine like you would throw in you home heating stove, and that when the bad guys cut the rear of the train off. No one in there right mind would try to burn short little fire wood in a large locomotive boiler and there was no sign of them closing the angle cocks before cutting off the rear of the train which should have gone into emergency. That would have ruined the notion of the doomed back end of the train rolling away in to oblivion.