On the same day, my stack of books at the library would include the Hermetica, books about Bigfoot, and the Condon report on UFOs. The Facility itself is described, as is its role in history. There are adventure ideas by the truckload, rules for Black Magic and Mind Control technologies, and discussions of how to incorporate all of it into an existing campaign. The Flying Saucers are at last revealed, alongside dangerous computer game technology, the secrets of the ancient Maya, and the complete story of the Ark of the Covenant. Some of it is real.
Truth is stranger than fiction because fiction has to make sense to the author.
Truth doesn't have anybody to answer to. At the end of it all, the links between fiction and reality became more complex and more complete. The book was full - with thousands of ideas still left to be explored. That exploration is left to the enterprising players and Game Masters who the book reaches. Please, share your secrets with us.