Jeff Abbott: The Last Minute [2011] trade paperback

Sam Capra is an ex-CIA agent, an ex-husband, and an utterly devoted father - to a child stolen from him by Novem Soles, an international intelligence agency as mysterious as it is powerful. In exchange for his abducted son, the group commands Sam to commit a high-profile assassination. Teaming up with an equally desperate woman, Sam must unravel a deadly conspiracy - and keep himself alive - if he's to rescue the only thing in the world that matters to him. The most dazzling novel yet from one of the world's best-loved suspense writers - a relentlessly exciting, emotionally involving tour de force.