The Sincerest Form of Flattery, by John G. Walker
“Life was simple for private detective Tom Statford. Sure, being the Keeper, the first, last and only line of defense between gods and mortals could make for interesting times, but a mundane existence in southeastern Virginia kept things on the boring side of life. Boring, until bodies appear with all the trademarks of ritualistic homicide. Now, the sole Keeper must not only stop a psychopath, but also the end of the world.