Job: A Comedy of Justice
Originally Posted by Emm
As do (off the top of my head) Friday, Time Enough for Love, and To Sail Beyond the Sunset. Much of his later work could be classified as either "strong poly theme" or "soft porn", depending on your mood at the time.
deals with it in a vague sense. More so open sexuality than relationship or marriage structures, but it's there.
As far as other authors go, Robert J. Sawyer has written some books that mention polyamory as well. The Neanderthal Parallax
, and Hybrids
) practically centers on it. It involves a parallel universe where our version of humanity is extinct and Neanderthals have developed a modern society, in which most people are bisexual and have both a male and a female partner. In Rollback
, which is set a few decades in the future, it is briefly mentioned that polyamory is a little more common and has come to the attention of the mainstream more than it is today. Several of his novels also contain alien races with a variety of socially acceptable mating habits.