From the corridors of the Hoover Building to the cells of Gitmo and the mountains of Afghanistan, Yemen and Pakistan, Graff tells the true story of how a generation of FBI agents taught themselves to confront threats no one had ever seen before.

THE THREAT MATRIX is also the story of the war within the war: the fierce battles between the FBI and CIA and Bush Administration and within the Bureau itself.

Spanning five decades and eight presidents, the product of unprecedented access and vast historical detective work, THE THREAT MATRIX is a landmark investigation that reads like a spy thriller.