Watchmen is a groundbreaking graphic novel written by Alan Moore and illustrated by Dave Gibbons. Set in an alternate version of the United States where superheroes exist, the story follows a group of retired vigilantes as they investigate the murder of one of their own. With its complex narrative structure, morally ambiguous characters, and thought-provoking themes, Watchmen revolutionized the comic book medium and remains a must-read for any fan of comic art.