Do you mean Alan Moore's "Watchmen"?
If you do, it's been collected into a graphic novel. I first read it in that format, and couldn't put it down.
In the late 1990s, a professor in the philosophy department of a local private college affiliated with the Church of the Brethren taught a very popular course in ethics that focused on situational ethics in society and politics. He used V for Vendetta and Watchmen as two of his required texts.