Uncritically accepting anything that was pseudo, Jim Marrs bought into the Priory of Sion and Rennes-le-Château conspiracy theories like a fish to water (neatly slotting into the Robert Anton Wilson category).

Jim Marrs
Rule By Secrecy: Hidden History That Connects The Trilateral Commission, The Freemasons, and The Great Pyramids (HarperCollins, 2000)

Jim Marrs
The Sisterhood of The Rose: The Recollections of Celeste Levesque (Novel, Ares Publishing, 2003; Disinformation Company, 2009; eBook, Disinformation Company, 2010)

Jim Marrs
The Rise of The Fourth Reich: The Secret Societies That Threaten To Take Over America (HarperCollins, 2009)

Jim Marrs
-Our Occulted History: Do The Global Elite Conceal Ancient Aliens? (HarperCollins, 2013)