In a dark dark room, there was a girl who found an old diary. When she started reading it in the room, she realized it was the diary of a person who had died in that very room. As she read on, she felt a cold breeze and the pages of the diary started to turn on their own. It seemed as if the spirit of the dead was present and didn't want her to read further.
The lack of visibility in a dark room makes it scary. When we can't see, our imagination runs wild. We start to think of all kinds of monsters and ghosts that could be lurking in the shadows. For example, a simple creaking sound can be made into a terrifying event in our minds because we don't know what's causing it in the dark.
It could be a horror story. The repeated 'dark' emphasizes the spooky atmosphere. Maybe there are some unknown and scary things lurking in that dark room.
One of the scariest could be the one about the haunted attic. The description of the creaking floorboards and the strange noises coming from the old boxes up there gives a really spooky feeling.
One of the scariest is probably 'The Green Ribbon'. The idea of a girl always wearing a green ribbon around her neck and the mystery behind it is really creepy.
People who are fans of short, atmospheric horror stories would love this book. It offers a collection of such stories that can be read in one sitting. Also, those who enjoy stories that build tension through simple yet effective language and settings would find it appealing. Since the stories are relatively short, it's great for someone with a short attention span but still wants to get into the horror genre.
One 'dark room story' could be about a person who gets locked in an old, abandoned mansion's dark room and starts to hear strange noises. They think it's just the wind at first, but then they notice shadows moving in the corner. Another story might be set in a dark room in a medieval dungeon where a prisoner is left alone with his thoughts and the unknown terrors that lurk in the pitch - black.