

Classic SF novel about an ice age planet where the inhabitants are neither male nor female except at certain points in their reproductive cycle when they may become either.
I first read this around 1980 and found it enthralling, loving the exploration of the ideas. I then read it again 20-odd years ago when I found the journey across the icecap tedious. This time it was more enjoyable but it didn't have the wow factor from when I first read it.
@RamsFan1963 3d