Question: Showboat World, written in 1975, is the second, stand-alone novel in a pair of science fiction novels by Jack Vance, was an American mystery, fantasy, and science fiction writer, he also wrote how many mystery novels, under the pseudonym Ellery Queen?
Sentence (from "Showboat World"): The plot structure which involves a series of dramatic presentations, often with humorous consequences, has parallels with Vance's 1965 novel Space Opera.
Relevant evidence: No