Watchmen is a groundbreaking graphic novel by Alan Moore and 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 a conspiracy that threatens to bring about nuclear war. Watchmen is known for its complex characters, intricate plot, and deconstruction of superhero tropes. It explores themes of power, morality, and the nature of heroism, making it a thought-provoking and influential work. Watchmen has been widely praised for its storytelling and has been hailed as one of the greatest comic books of all time.