The Forgotten Door

From Author Wars - https://authorwars.com/publications/the-forgotten-door-40098.html

Overview:

Title: The Forgotten Door
Author: Alexander Key
Year: Unknown
ISBN-10: 0664323421
Publisher: Westminster Press
Price: $3.50
Pages: 126
Binding: Hardcover
Type: Novel
Title Reference: The Forgotten Door
Notes: Originally entered as 1965 (date used in WorldCat), but ISBN is not possible (nor SBN) on a 1965 printing, so date for this edition is unknown.