Description: 'In the twenty-third century pioneers have escaped the crowded Earth for a life in self-sustaining orbital colonies. One of the colonies, Rotor, has broken away from the solar system to create it's own renegade utopia around an unknown red star two light-years from Earth: a star named Nemesis.' - From the back cover of the 1990 Bantam pb edition.
Another back conver:
'Tearing its way through space on a collision course for Earth is NEMESIS, a fiery ball of destruction, a dwarf star as red as the coulour or blood.
Circling NEMIS is ROTOR, an Earth colony whose occupants have cut themselves off from the anarchy and degeneration of an old and wasted worlds.
For them ROTOR is a d kind of Ark.' - From the back cover of the Bantom edition (ISBN 0-553-40069-X), where the first paragraph uses the term 'collision course for Earth'.