Helliconia Summer
From the back cover:

Imagine a world a thousand light years from Earth, where each season lasts for generations, and each generation knows only one season.

Where twin suns warm the icy winds of the Sibornal, the forests blaze and kingdoms turn into ashes... once every 2500 years.

Where it is summer again on Helliconia.
Life on other planets, Fiction, English Science fiction, Space habitats, Themes