Green Lantern #51

Gil Kane's vivid cover for this March 1967 issue sets up a genuinely compelling dilemma: Green Lantern, caught in the grip of two enormous brutish figures, looks hard-pressed while a blue-suited hero in the background unleashes crackling energy blasts against the same towering foes. The cover copy promises "Green Lantern's Evil Alter Ego!" — an arch-villain the Emerald Crusader has to defeat but doesn't dare to — which is exactly the kind of tantalizing moral puzzle that made DC's Silver Age so engaging. John Broome's scripting and Kane's dynamic linework combine to make this a thoroughly entertaining entry in the series.