The League of Extraordinary Gentlemen: Black Dossier

Alan Moore and Kevin O'Neill's The League of Extraordinary Gentlemen: Black Dossier (2008, DC) is a standalone, meta-fictional volume that breaks the fourth wall of the entire League saga. Presented as an in-world government file, it collects a dizzying array of documents—from prose stories and comic strips to maps and pop-up art—that chronicle the secret history of the League across centuries. With Kevin O'Neill's grotesque, baroque linework and Ray Zone's 3-D sequences, this single issue is a dense, experimental artifact that expands the series' universe through its own form.