Black Sunday book and movie

I recently finished reading the novel Black Sunday by Thomas Harris. It has everything you could want in a Thomas Harris novel (except for Hannibal Lecter!), great character development, great suspense, all building up to an inevitable climax! The settings and descriptions are grim, but that doesn't make the action any less satisfying or the plot any less compelling. This story of a terrorist attack on the Super Bowl works great as a book and as a movie (by John Frankenheimer, which I've also seen); I like both, even with the happier ending used in the movie.  Both are recommended!