Superheroes have been outlawed, with some going into retirement, some becoming government agents, and still others turning to vigilantism. HUGO AWARD WINNER | A NEW YORK TIMES BESTSELLER In an alternate America, a murder mystery evolves into an ominous, planet-wide conspiracy in a world where superheroes shifted the course of history as we know it The paperback edition of the groundbreaking masterpiece from comics legends Alan Moore & Dave Gibbons that took…