Analysis of information sources in references of the Wikipedia article "Pluto in fiction" in English language version.
Lots of authors since 1930 used Pluto as starting or finishing point of a grand tour of all the planets
Pluto and its moon Charon have featured in more science fiction tales than might be expected. [...] Jupiter and the outer planets remain unexplored territory.
As with the other outer planets, relatively few descriptions of Pluto have been brought back by multiversal explorers.
Its status as the outermost planet has, however, conferred a certain mystique upon it which has led to its alternativersal variants being more widely reported—and more exotically differentiated—than those of Neptune or Uranus.
since these worlds have reasonably been viewed as cold and inhospitable, they have generally been underutilized as settings for science fiction stories. [...] Since Pluto, discovered in 1930, was immediately recognized as a small earth-like world, it was more frequently depicted as a home to intelligent life
In spite of its presumed inhospitability, Pluto figured more prominently in pulp science fiction than Neptune because its status as a newly discovered planet increased interest in it.
For several decades Pluto came in for a certain amount of special attention as the apparent Ultima Thule of the solar system [...] Pluto, during the period when its orbit seemed to mark the outermost limit of the solar system, was popular for just that reason.
Lots of authors since 1930 used Pluto as starting or finishing point of a grand tour of all the planets