That Darn Squid God

In the year 1881, the moon suddenly begins to turn around and reveal its long-hidden arse to the startled world.
While most of Humanity finds the strange event creepy, but fascinating, two British explorers know the horrible truth. The rotating moon is the legendary sign that foreshadows the return of a prehistoric demon, the monstrous destroyer of Atlantis, an unkillable colossus known only as the deadly, dreaded, Squid God.
Racing around the world, and against the clock, Prof. Einstein and Lord Carstairs battle the fanatical legions of Squid God worshippers (squiddies) in a valiant effort to stop the ghastly rebirthing ceremony and keep the demonic mollusk locked in the stygian depths of its unearthly lair.