A NEW YORK TIMES BESTSELLER Once, there were infinite Earths. Untold timelines. Innumerable Elseworlds. Then there came a Crisis...a Zero Hour...a Flashpoint. Worlds lived. Worlds died. Now they all must fight for their future The evil alien intelligence known as Brainiac has stolen 50 doomed cities from throughout time and space and brought them to a place beyond the Multiverse--a sentient planet of his own design, a world with the power of a god...