The story 'of windows and doors' might be about the significance of these two elements in different aspects. Windows can symbolize a view to the outside world, a connection between the inner self and the outside. Doors could represent opportunities, entrances to new experiences or changes in life.
Change could also be a theme. Just as doors can be opened or closed to mark a change in a physical space, the story could use windows and doors to represent changes in the characters' lives. For instance, a window might be the place where a character realizes they need to make a change, and a door could be the first step in making that change happen.
The main idea might be about the discovery or significance of the golden windows. It could involve a journey towards these special windows, either literally or metaphorically.
I'm not sure as I haven't read the story. But it could be about discovery or the magic of seeing things from a different perspective, just based on the title.
I recommend I Have a House of Horrors to you. The plot of this book is very similar to the novel you mentioned. The protagonist was also trapped in a terrifying house, surviving with others, and gradually revealed the dark secrets of the house. I hope you like this fairy's recommendation. Muah ~😗
Doors are made to let people in and out, but windows can sometimes be used as entrances and exits, such as thieves or novels.
In novels or movies, windows were often used as entrances and exits. For example, a thief could enter a house through the window and then leave through the window, or a character could climb out of the window to escape from the pursuers. This kind of plot often appeared in novels, movies, and television works to bring novelty and imagination to the readers.