The Essence of the Problem - Marshall Drummond Case Files, #6

Marshall Drummond has faced many challenging cases in the past, but nothing could prepare him for taking on a case for his old boss, the Chief of Police. Caught in a web of lies and secrets, Drummond must figure out why the Chief's wife and maid are being terrorized by an other-worldly being before it returns to kill them all. Then he has to figure out how to stop the thing. Welcome to the Marshall Drummond Case Files.
These stories explore the dark mysteries and thrilling adventures of 1940s PI, Marshall Drummond, before he died and became the ghost detective found in the bestselling Max Porter Paranormal Mysteries.