Vernor Vinge wrote serious science fiction; Terry Pratchett wrote fantasy with a strong comical and satirical focus.
Although each writer won more than one Prometheus Award for works that wove in libertarian and anti-authoritarian insights and themes, few of us tend to think of these two late great authors in the same breath, or any close to the same fiction or genre category.
While surely their respective fan bases overlap to some extent, even the hardest-core Pratchett and Vinge fans probably wouldn’t imagine that much else might link them – especially Fans of Vernor Vinge and Terry Pratchett, even if that fan base overlaps, probably don’t think of both authors together.
Yet, they had a strong connection in fiction, with one author favorably mentioning and imagining the future work of the other in a novel.