While I am writing my third murder mystery, The Phoenix Code, which will complete the trilogy, I am also working on the storyboard for a book idea that rattled around in my head thirty years ago.
At the time, desktop IBM computers and word processing were in their infancy. Besides, I had no clue how to touch type and writing with paper and pen was way too boring. In other words, I was still too immature to take writing seriously. I did manage to write a few chapters in a notebook, but my girlfriend at the time found the notebook and freaked. She accused me of plotting to murder her in a most foul way and we broke up. I didn't realize, at the time, that my writing was good enough to fool a very smart lady and probably was good enough to publish, in theory. There was no such thing as "publish on demand" in those days.
The title of the book idea is Vectus, and without giving the story away, I can say that the brutal killer is thought to be supernatural in nature. He, or she, may well be supernatural, but the only way you are going to find out is to read the book when it comes out next year.
This much is for sure. You can expect a story that is terrifying and way to close too home for comfort!