It was interesting to create a series of stories around a common theme, with a sort of Oulipo constraint to the whole enterprise. I’m not sure how it resonated with readers — people tend to not comment so much on fiction posts.
I could continue on with the Demonology series, but it occurs to me that it might be even more interesting to come up with a series of stories that end up interconnecting into a coherent novel. Each story would stand on its own as an individual work, but taken together they would link together to form a single larger narrative arc.
I am aware of similar projects, as in the stories of Zenna Henderson. But those stories were only loosely coupled, via a common theme. It would be interesting to create a more tightly cohesive narrative, a true novel that just happens to consist of self-contained pieces.