Page 5: The Other Dimension
It was our old friend H.P. Lovecraft who first came up with the notion of combining the ideas of alternate dimensions (from quantum physics) and underworlds/domains of evil (from folklore & mythology).
The appearance of our underworld owes a lot to the paradigms established by Swiss artist Hans Rudi (H.R.) Giger, whose "biomechanical" airbrush paintings led him to becoming a leading concept artist for Hollywood films, most notably with his seminal design for the creature in Ridley Scott's Alien (1979).
There are no new references in part 9.