The Peacekeepers. The Warlord. Book 9.

As a deadly plague spreads across America, the peacekeepers are forced into isolation to survive, leaving a power vacuum that attracts outlaws and extremist threats. With the world blaming the United States for the crisis and rumors of impending attack, the peacekeepers face a formidable enemy committed to their eradication. Tensions escalate as hostile sentiments and violence threaten to overthrow stability across the nation.