Dragoneye (Outlanders #22)

Two centuries after skydark, the oligarchy of the nine barons who have governed nuke-ravaged America endures -- yet their control as plenipotentiaries of earth's first nonhuman inheritors rapidly diminishes. For as the myth that shrouds the planet's secret rulers is exposed by a handful of scientists and warriors dedicated to freeing humanity from the eternal yoke of slavery, the truth becomes more deadly . . .

Zero Hour

Deep inside the moon, a dark and timeless place of unimaginable power and mystery, two ancient beings live on -- the sole survivors of two mighty races whose battle to rule earth and mankind is poised to end after millennia of struggle and subterfuge. Now, in a final conflict, they are prepared to unleash a blood sacrifice of truly monstrous proportions that will obliterate earth and its solar system. At last Kane, Grant and Brigid Baptiste will confront their creators . . . and now, ultimately, their destroyers.