Helliconia Winter (Helliconia Trilogy‪)‬

A civilization crumbles as its planet hurtles away from its star in the final chapter of this "monumental" epic from the Grand Master of Science Fiction (The Times, London).

After many centuries, the flowering of human civilization has begun to dwindle again and the Great Year slowly progresses while the long, deadly cold winter looms—but a break in the long, repeating cycles of growth and decay may result from the long-ago visit of the Earthman. New legends of the spring and summer have evolved and a new future may be aborning.