OH BOO HOO, THEY CHANGED A FEW DETAILS, THE WORLD COMES TO AN END! Red October was the only book I actually thought was better than the movie. Even though I love Sean Connery, and thought the movie as a whole was good, cutting out the part about scuttling the US sub left a big plot hole that bugged me to no end.
Every other book, the movie was better. Patriot games and Clear and present danger were both way more enjoyable as movies, mostly because of Harrison Ford. Harrison Ford's acting trumps Tom Clancy's writing easily.