Armageddon Axis — James Axler

ALIEN SPECTER
Though the devastation of the nukecaust has long passed, the unseen force that rules the earth's grim destiny watches over the polarized world of garrisoned cities and lawless Outlands. Once an enforcer of the New Order, Kane is a renegade who has uncovered humanity's dark secrets. Operating from the hellzones of the new America, his quest to stop the conspiracy ensnaring mankind endures....

PRIMAL INSTINCT
What was supposed to be the seat of power after the nuclear holocaust, the Anthill, a vast installation inside Mount Rushmore, is still a rich source of technological marvels -- and a new power base of destruction. Suspecting a trap, Kane and his fellow exiles venture to this hot spot via mat-trans to face an army of bioengineered monstrosities, a secret weapon and an old enemy conspiring to jump-start the second Wave of Armageddon.

In the Outlands, the battle to reclaim the future has begun.