Prinn, LudwigLudwig Prinn is the author of the forbidden book De Vermis Mysteriis, or The Mysteries of the Worm. Prinn and his book are the brain child of writer Robert Bloch who, like HPL (Alhazred of the forbidden Necronomicon), Howard (von Junzt of the forbidden Unaussprechlichen Culten) and all the rest of the horror circle, were following in the footsteps of Robert W. Chambers and his forbidden fictional book, The King in Yellow.
("The Haunter of the Dark," "The Shadow Out of Time")
See also: De Vermis Mysteriis and Robert Bloch