2018: COUNTDOWN TO APOCALYPSE Two worlds are locked in mortal conflict. The aliens of the Tenth Planet must harvest Earth's vast resources soon--before their world's elliptical orbit hurls them back into deep space for another 2000 years. If they fail, their species cannot survive the long journ...
Mankind has discovered that a tenth planet exists in the solar system. That planet's hibernating inhabitants emerge every 800 years to stripmine another world for food and resources. This time, that world will be Earth.