On 13 September 2019, the office of the Information and Privacy Coordinator received your 12 September 2019 Freedom of Information Act (FOIA) request for information or records on Project Ringer.
For the government documents in the book, I read a lot of declassified government documents. You can find many of them on the CIA official website, as well as The Black Vault. I read from a lot of different kinds of documents, but the ones I found most useful were from Project MK Ultra (the U.S. government's experiments using LSD, primarily in the 60s and 70s) and Project Blue Book (UFOs!)
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