Declassified Documents: Guides

In addition to these guides, researchers will find other works on these topics (e.g. Secrets: the CIA's war at home by Angus Mackenzie) have excellent bibliographies which should be used when researching individuals, events or covert operations. Histories of the agencies (e.g. Body of secrets: anatomy of the ultra-secret National Security Agency from the Cold War through the dawn of a new century by James Bamford) or biographies of notable persons such as William J. Donovan or J. Edgar Hoover can provide valuable background on the agencies and the activities as well.