The Sigma Protocol: A Novel

Ben Hartman is drawn into a lethal mystery after a shocking attack in Zurich. As he investigates, Justice Department agent Anna Navarro follows a separate trail through suspicious deaths, records, identities, and financial evidence. Their paths converge around Sigma, a hidden network rooted in wartime history and sustained by postwar influence, money, and institutional power. From Halifax and Washington to Paraguay, Vienna, and the Austrian Alps, the investigation escalates toward the secrets concealed at Schloss Zerwald.