From publisher blurb:
Warning: there are mature themes and cosmic alienage within... madness may result.
This is an eldritch pulp / investigative horror scenario for The Outer Presence roleplaying game, suitable for experienced characters. It works just as well for the 1970s as it does for 2017. Converting the adventure to your system of choice should be a snap.
Within the scenario, investigators are hunting a serial killer. Their friend was leading the case, but now he's disappeared. It's a spiral staircase of sordid mystery until the final revelation at the end!
His Flesh Becomes My Key has some interesting things going on - definitely Lovecraftian - and I'm quite proud of it. Great artwork, too! Don't want to say any more because of spoilers.