V for Vendetta

Now this is a really good comic book... Alan Moore, the creator of this one and the previously mentioned Watchmen, is regarded as one of the greatest comic book writers of all time and I am big fan of his work. His works were made into movies with more and less success, but I prefer the source material.
This one is my favorite and the movie is pretty good. A lot better than these summer blockbuster crap.

 I strongly recommend it!