Action Comics Vol. 1 (1938-2011; 2016-) #1039

Plot

THE WARWORLD SAGA, PART FOUR / MARTIAN MANHUNTER, PART THREE

Weeks after arriving on Warworld, Superman and the Authority are still learning the art of survival. But Superman refuses to bow to Mongul’s law, continuing to risk his life for his new allies, his fellow slaves, and even his enemies. As members of the Authority fight Mongul’s rule from the shadows, Superman discovers an ancient mystery regarding Warworld’s true origins… that he himself may play a part in. Also featuring Martian Manhunter Part Three!