John Carter Warlord Of Mars #12

John Carter and Dejah Toris discover what may well be the key to repair a dying Martian atmosphere. But the long-lost technology White Martians are not only protected the deadly robots, he is also wanted by other agents, who will stop at nothing to get it. John Dey and entirely save Mars, but only if they can save themselves! Start of two-part story that could change forever Mars!