Robert Ludlum's The Bourne Betrayal (Bourne Series #5)

Already devastated by loss, Bourne is shattered by a report that his last friend in the world, Martin Lindros, has gone missing. A CI deputy director, Lindros was in Ethiopia tracking suspicious shipments of yellowcake uranium and atomic bomb weaponry. His last lifeline to humanity, Bourne will not let Lindros go. Despite his hatred for CI, Bourne sets out to rescue his friend and finish the job: dismantling a terrorist network determined to build nuclear armaments by cutting off their source…