Graff, Garrett M., the threat matrix : the FBI at war in the age of terror / Garrett M. Graff. - United States of America : Little Brown and Company, 2011. - 3, 666 pages : pictures ; 24 cm. Includes bibliographical references and index. ISBN: 9780316068611 Subjects--Topical Terms: War on terrorism-United States of America. Dewey Class. No.: 363.232 / G75