Now comes The Sigma Protocol, a new breakneck novel of intrigue, conspiracy, and terrifying deception. American investment banker Ben Hartman arrives in Zurich for a ski holiday, the first time he's been back to Switzerland since his twin brother died there in a tragic accident four years earlier. But his arrival in Zurich triggers something far more sinister than his brother's fate. When Ben chances upon Jimmy Cavanaugh, an old college friend, Cavanaugh...

Nicholas Bryson, a former operative for the American secret intelligence group the Directorate, is forced to rely on his rusty skills and unreliable contacts for help when he is recruited years after his retirement by the CIA to infiltrate the group which Bryson has just learned was working against the best interests of the country.

Adam Hayes hat beschlossen, seine tödlichen Fähigkeiten nicht länger in den Dienst der Geheimorganisation Treadstone zu stellen. Stattdessen will er nur noch Aufträge übernehmen, die er selbst moralisch vertreten kann. Doch die Vergangenheit lässt sich nicht so einfach abschütteln. Als er nach einem Angriff auf sein Flugzeug bei einer Mission in Burkina Faso notlanden muss, findet er sich allein auf unwegsamem Territorium wieder. Ihm auf den...

Lt. Col. Jon Smith, activated in the wake of a deadly attack on a nano-technology research facility, sets out to learn the truth about the leader of the eco-conscious, anti-technology Lazarus Movement, and uncovers a plot that could change the very nature of the world.

A mild-mannered professor is forced to assume again the deadly alter ego he created in Vietnam years ago as part of the Medusa Brigade.

Two spies, one American, the other Russian, have vowed to kill each other as revenge for the murder of a family member by the other. They are forced to work together as the only men capable of destroying an international circle of killers.