It is impossible to imagine American popular culture without Marvel Comics. For decades, Marvel has published groundbreaking visual narratives that sustain attention on multiple levels: as explorations of the relationship between power and responsibility; as metaphors for the experience of difference and otherness; as meditations on the pain of adolescence and the fluid nature of identity; as examinations of the meaning, and limits, of patriotism; as ironic juxtapositions of the cos­mic and the quotidian; as resources for the understanding of political and social history; and as high watermarks in the artistic tradition of American cartooning.