An alternative history horror story - in 1590, a supernatural event occurred that sent America on a different course. Now the sentinels walk the walls surrounding the site of that event, watching, and guarding against those who would seek to find a way in to the most dangerous place in the world.
This is an ebook available as an Instafreebie via Inklings Press: https://www.instafreebie.com/free/KaMsH