The Edge Hardcover – February 20, 1989 by Dick Francis 
Part of: A Dick Francis Novel (20 books)
 
A high-class, transcontinental horse-racing junket should be an idyllic getaway for the super-rich.
But one passenger on this train is a sociopath, a genius at blackmail and criminal corruption—and he plans to take everyone for everything they've got.
 
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