Sacrament — Peter Milligan

"The Exorcist" meets "Alien" in this sci-fi/horror story about a rogue priest at the edge of known space who must fight a demonic entity on a distant planet where religion has been outlawed!In the year 2999, mankind abandoned Earth and fled into outer space. Now, a disgraced priest, called into action to perform an exorcism on a remote space colony, is about to discover that no matter how far you run, you can’t escape your demons, and the Devil is, in fact, real. In space, no one can hear your prayers...