Tom Clancy was one of my favorite authors. I really liked how his novels had very believable plots even though it was fiction. The plots of his novels always left me with the impression that something very similar could happen in real life. His attention to details was extraordinary as well. My favorite Clancy novels are "The Hunt for Red October", "Without Remorse", "Debt of Honor", "Executive Orders", and "Rainbow Six". I also really like the movies made from some of his novels, especially "The Hunt for Red October", "Patriot Games", and "Clear and Present Danger".
RIP Tom! You will be missed.