At Mr. and Mrs. Unkerton's party in Greenway's House, Mr. Satterthwaite learns of a haunted window: No matter how many times it is replaced, it always contains the image of a gentleman in a plumed hat. When gunshots are heard, Satterthwaite finds that two of the guests have been shot dead, which is shortly followed by a sighting of the gentleman in the newly-replaced windowpane. Can Mr. Quin shed light on the mystery?
Used availability for Agatha Christie's The Shadow on the Glass
December 2012 : USA Audio edition
Title: The Shadow on the Glass: A Harley Quin Short Story
Author(s): Agatha Christie
May 2012 : USA, Canada Kindle edition