Sure, one plot development is rather hard to accept (you'll know it when you come across it) and some of the plot threads maybe work out a little too neatly, but in this case I'm okay with those things because of all the novel's strengths. This is just an excellent book.
I've been aware of Ketchum's work for years and in fact I own most of his books, but this is the first novel of his that I've read. It almost certainly won't be the last.
(Update: Well, actually, so far RED is the last Ketchum novel I've read. I still own a number of them, replacement copies bought since the fire, but I haven't read any of them yet. Just another example of the old "too many books, not enough time" syndrome. Evidently there's a movie version of this novel, too, made in 2008, that I haven't seen and wasn't even aware of.)