Eric James Stone's 'That Leviathan, Whom Thou Hast Made' (novelette, religion, free)

In a very colorful background, a Christian missionary priest convinces a "god" to an elder star-traveling alien race to let its followers switch allegiance to Christian god.

Fact sheet.

First published: Analog, September 2010.
Download full text from author's site.
Rating: B.
Nominated for Hugo Award 2010 in novelette category.