Three Knocks on the Door

From Author Wars - https://authorwars.com/books/three-knocks-on-the-door-3336109.html

Overview:

Title: Three Knocks on the Door
Author: Richard Gavin
Year: 2020
Type: Short Fiction

Editions/Publications:

Unknown. Apostles of the Weird (Unknown, Richard Gavin, PS Publishing, ISBN-10: 9781786365668, £25.00, 337 pages, Hardcover, Anthology)