Vocations of Valor is a series of novella length works that all take place in the same universe, though they aren't directly connected.  It's heavily inspire by classic sci-fi such as Starship Troopers and A Canticle For Leibowitz and also a lot of influence from epic fantasy. The world and religion, which plays a large role in the novellas, is largely based on the traditions and aesthetic of the Catholic Church, but this isn't "Christian Fiction" anymore than Warhammer is.