A visitor should be fed, but this one could eat you out of house and home ... literally!
Strange how often the Millennium has been at hand. The idea is peace on Earth, see, and the way to do it is by figuring out angles.
First appeared in Galaxy Magazine, 1957/7.
A part of Notions: Unlimited collection of science fiction short stories by Robert Sheckley. It was first published in 1960 by Bantam Books.