John Carter, Warlord of Mars #24

Three of Edgar Rice Burroughs' greatest science-fantasy heroes — John Carter sword drawn and charging, Dejah Thoris firing a blaster, and the towering green warrior Tars Tarkas — fill this dynamic 1979 Marvel cover by penciler George Pérez and inker Terry Austin, locked in fierce combat against a shadowy masked figure looming behind them. The bold "BETRAYAL!" logo at the bottom sets the stakes for Chapter 9 of "The Master Assassin of Mars," a story arc that writer Chris Claremont and artists Mike Vosburg and R. Villamonte have been building across the series. It's a striking piece of Barsoomian action that showcases why this corner of Marvel's 1979 lineup had real staying power.