The War on Leakers joins the growing debate over surveillance and the national security state, bringing to bear the unique perspective of one of America's most respected diplomatic historians. Gardner examines how the government and media have grappled with national security leaks over nearly five decades, what the relationship of leaking has been to the exercise of American power during and after the Cold War, similarities and differences between leakers over time and the implications of all this for how we should think about the role of leakers in a democracy.