I am writing to you for help and advice.
I am working on a novel where my main character is accused of breaking into a shed through a window and murdering a lady inside. It is only later that another character realises that since the larger bits of glass are on the outside of the building the window was broken from the inside, not the outside.
I would love the second character to realise this because they are reading an Agatha Christie novel where this clue - which side the window was broken from - is part of the story.
Do you know whether there is anything like this in any of her many books?
Any advice most welcome!