The more I think about it, the more I come to the conclusion that my work is probably not best described as Science Fiction.
I consider it to be Science Fiction because I consider philosophy to be a science, but a genre description isn’t for me, it’s for readers. Readers are looking for a short-hand way to quantify a product, not an apologetic or a manifesto.
I don’t really want to market my work as Horror, although it contains horrific elements, because I feel that Horror implies that the invocation of fear is a primary function of the work, and that’s just not what I do.
So I suppose that makes me a Fantasy writer by default. I don’t like that description, either, but I have to say that Urban Fantasy is probably the least misleading genre for me to use. There are certainly fantastic elements, and those elements are integral to the story. However, I set out deliberately to avoid all of the standard Fantasy tropes–I have no zombies, vampires, werewolves, elves, dragons, etc.
When people ask me to define my own work (rather than pick a category from a list) I use the term Speculative Fiction. I think that fits the best–I always begin with speculation, a “What If?” I don’t confine myself to the probable or the provable or the real, my concern is the construction of a subjunctive universe that it internally consistent, not congruent with the known.
Unfortunately, Speculative Fiction isn’t usually available as an option. So I think I’ll just go with Fantasy, and make it clear in my descriptions what that means to me.