The location is the planet Acoma, Garry Bart's (Doctor to the Galaxy, 1964) planet, but this is not a sequel to that book even though some of the same characters do make an appearance (including the lovable little hominids). Barnaby Finch and Jenny Jethro are the main characters here; they came from earth as part of a class entomological field trip. As usual with this author the science fictional gimmick is a peculiar animal which, also as usual, is more attractive than believable. Here, it looks like a butterfly, is designated as a flutterbye, which becomes vital for investigation after it appears that what might be a larval form is the source of a deadly disease. The emphasis is really more on fiction than science, Barnaby's and Jenny's romp through the jungles is pleasantly dangerous and flirtatious, and the characters are likable.