Citadel — Eric Meyer

What caused the disaster?
In order to survive, and return their lives to normality, they must find what caused the disaster, and discover a solution. A way to get the power on, water running in the pipes and the telephones ringing. A distant fortified complex, once the headquarters of NSA, promises to provide answers. Fort Meade in Maryland, known as The Citadel. Impossible to breach, yet somehow, they must get inside.

When the government falls, who governs the nation?
The problems in reaching it are immense. Their adversaries are everywhere, roaming the countryside, searching for victims and loot. Omega, who laid claim to the task of maintaining law and order as a shallow pretext for theft and murder. Raiders, the cannibals who prey on human flesh. And inside The Citadel, the unknown dangers of those men who claim to be the legitimate successors of Congress, the Senate and even the President himself.

Forever Free Part IV - Citadel is the fourth in an ongoing Forever Free series of short novels that chronicle the vicious aftermath of the breakdown of American society.