The PreScriptures are the original sacred text of the Church of the SubGenius, and were narrated to J. R. "Bob" Dobbs in 1953 by Jehovah 1 during the Divine Emaculation of "Bob". Although no known copies of them are available to the public, they are quoted in various SubGenius publications, such as the Book of the SubGenius. If you would like to purchase a copy, TOO BAD. YOU CAN'T.
Here is a video of the events foretold in PreScriptures 35: