Viagens Interplanetarias

The Viagens Interplanetarias series is a sequence of science fiction stories by L. Sprague de Camp, begun in the late 1940s and written under the influence of contemporary space opera and sword and planet stories, particularly Edgar Rice Burroughs's Martian novels. Set in the future in the 21st and 22nd centuries, the series is named for the quasi-public Terran agency portrayed as monopolizing interstellar travel, the Brazilian-dominated Viagens Interplanetarias ("Interplanetary Voyages" or "Interplanetary Tours" in Portuguese). It is also known as the Krishna series, as the majority of the stories belong to a sequence set on a fictional planet of that name. While de Camp started out as a science fiction writer and his early reputation was based on his short stories in the genre, the Viagens tales represent his only extended science fiction series.

The Viagens stories were written in two phases; the first, written between 1948 and 1953 and published between 1949 and 1958, was a burst of activity that produced the first four Krishna novels and most of the non-Krishna pieces, including all the short stories. The second, produced at a more deliberate pace from 1977–1992, comprised the remaining four Krishna novels and the two novels of the Kukulkan sequence. The early works established the setting of a cosmopolitan future interstellar civilization comprising both Terrans and a handful of other space-faring races who trade and squabble with each other while attempting to maintain a benign stewardship of the more primitive planetary societies with which they come into contact. The later works assumed but largely ignored this background, concentrating exclusively on the adventures of Terrans on the alien worlds of Krishna and Kukulkan.