 The early stories focus almost entirely on medical problems , mainly from Conway 's viewpoint . In Dave Langford 's opinion the <unk> novelties were becoming less credible by the end of Star Healer , and using a variety of alien viewpoint characters gave the later books " considerable new pep " . These also deal with deeper issues , notably in The Genocidal Healer , and better than most science fiction according to Resnick . 
