In 1938 Action Comics number 1 introduced the world to Superman. In a matter of years, the skies of our imaginations were filled with mutants, aliens and vigilantes. Batman, Wonder Woman and the X-Men - in less than a century they've gone from not existing at all to being everywhere we look. But why? For Grant Morrison, possibly the greatest of contemporary superhero storytellers, these heroes are not simply characters but powerful archetypes whose ongoing story arcs reflect and predict the lives we live. In this exhilarating book, Morrison draws on history, art, mythology, and his own astonishing journey to provide the first true chronicle of the superhero.