The interesting part of the Sime/Gen books is how the biology totally drives the relationships. One of the first ones I read started off in the area where they tried to keep all this stuff sekrit and pretend to the kids that simes didn't exist, which made for some really awful disasters. No education, no exposure, you end up with untrained simes who can't control anything they're doing and dead gen a lot, so the enraged populace murder any new simes they can catch. It's very Shirley Jackson/The Lottery.
They were written by Jacqueline Lichtenberg and Jean Lorrah. I don't know if other folks picked up and carried on in the same universe, I thought they were talking about it.