The Ghost Downstairs

From Author Wars - https://authorwars.com/publications/the-ghost-downstairs-563792.html

Overview:

Title: The Ghost Downstairs
Author: Leon Garfield
Year: 1972
ISBN-10: 0582150949
Publisher: Longman
Price: £1.25
Pages: 91
Binding: Hardcover
Type: Chapter Book
Title Reference: The Ghost Downstairs
Notes:
Price from lead review in "Unreal but True: Isabel Quigly on fantasy".The Guardian 1972-07-13 p15 (extraordinarily positive) Evidently this one is the paradigm of the title, the unreal story that is credible; "valid" as "mythically true" with "a pattern that makes spiritual sense".
This entry is for the initial printing.
Day of publication from Amazon.co.uk.
For this ISBN as of 2018-07-09, Amazon UK shows date 1972-04-10 in search report, as not found in the books department, without the familiar product page one link away. Amazon US reports "Prentice Hall Press (April 10, 1972)".