Then Again: The Third Dekaeon Master of Spiders Comic story, published 1967 Doctor: 2 featuring Gillian, John Written by Roger Noel Cook. Arbitrary placement Takes place on an unnamed planet. Jack Vance’s 1950 novel/linked short stories The Dying Earth and its sequels are set in the 21 st Aeon. It could be that Vance meant by this the 21 st Aeon since the creation of the universe, which would be approximately back in the Eighth Aeon, but I’m assuming it is set on the same “Earth” as Dark is the Sun . and much later, so I am interpreting it as the twenty-first Aeon CE. The False Planet Comic story, published 1977 ...