: This group at George Washington University is known for its Heroic Excavators of Government Secrets who use the Freedom of Information Act (FOIA) to unearth classified history.
: A comprehensive encyclopedia of secret organizations , ranging from the Illuminati to modern-day intelligence agencies. 3. Physical Sites & Modern Infrastructure Sometimes the "secret government" is a physical place. Declassified Documents - Finding U.S. Government Documents Secret Government
For a structured narrative on how "secret" branches of government operate, these authors and books are frequently cited as authoritative: : This group at George Washington University is
: An online reading room containing over 6,700 documents that have been declassified, covering everything from counter-terrorism to unexplained phenomena . Physical Sites & Modern Infrastructure Sometimes the "secret
If you want to read actual "secrets" that have been brought to light, these resources offer primary source materials.