"Originally published in single magazine form as JLA 1-4"--P. preceding t.p.

With that in mind, Grant Morrison ushered in a new era for the JLA, restoring the membership to the core members and providing them with a headquarters befitting the Earth's protectors. From their Watchtower on the Moon, they can monitor activity at all times, but they're surprised when their fist threat comes not form a continent but from another planet. -back cover.