Adversary by S. A. Barton
Approx. 7,130 words.
Published on October 9, 2012.
For ten thousand years, the people of the habitats have lived in fear of Adversary, the focus of evil in the solar system.
One family, however, has grown to doubt the truth of the old tales. The four of them will challenge evil itself with nothing but a single shuttle and their heretical curiosity...