The little Med Ship came out of overdrive and the stars were strange and the Milky Way seemed unfamiliar. Which, of course, was because the Milky Way and the local Cepheid marker-stars were seen from an unaccustomed angle and a t-yet-commonplace pattern of varying magnitudes. But Calhoun grunted in satisfaction ... Written by Murray Leinster (a pseudonym of William Fitzgerald Jenkins's) This World Is Taboo was first published as Pariah Planet in Amazing Stories, July 1961, and is the second volume in the Med Services series. Leinster wrote more than 1500 stories and articles during his career and is credited with first using the concept of parallel universes in his fiction.