Central Heat by David Dvorkin
Price: $3.99 USD. 109580 words.
Published on May 5, 2010. .
When aliens remove the sun, life survives in military bunkers under the earth and in lunar bases. Underground America devolves into a religious-military dictatorship. Jonathan Holroyd escapes to the surface and finds a new world warmed by an artificial sun, and only slightly more freedom than in the dying world he left behind. He rises to a position of power. But now the aliens are coming back.