Silent Magic - The Adventures, Romance and Enlightenment of Clay St. Clair by John Dennis Viviano

Afghanistan war hero, former Army Ranger, brilliant mathematician and part-time FBI Contractor Clay St. Clair is drawn into an international thriller by his former commanding officer and corrupt CIA operative Rush Mackinaw. Along with his beautiful, smart and athletic girlfriend Nancy Picararo, he uncovers Rush’s plan to financially blackmail the world.