Publisher's Synopsis
An excellent collection of SFWA Grandmaster Damon Knight's always-excellent stories-three short novels in this case:
Rule Golden-what if the Golden Rule were enforced in reverse by some force-the bad things you do to others are done to you?
Natural State-are cities doomed by genetic engineering?
The Dying Man-what would it be like to be immortal... then suddenly find out you'd become mortal?
(Note that Rule Golden and Other Stories includes these same three, plus two more.)