Maybe because the popularity of Two Sentence Horror Stories led to the decision to create a trilogy to satisfy the audience's demand for more content and deeper exploration of the horror concepts presented.
It could be that the storylines in Two Sentence Horror Stories are rich and diverse enough to warrant a trilogy to explore different aspects and expand on the themes.
Story 1: I woke up to a cold hand on my face. When I turned on the light, no one was there.
It's called that because the main feature of these stories is that they can be told or written in just two sentences, creating a spooky effect in a short form.
I think 'The clock stopped at midnight. Then I heard footsteps.' is quite scary. It gives this feeling of something ominous starting right at a spooky time.
Another really scary one could be 'My phone rang at 3 am. The caller ID said it was me.' It plays on the idea of the self being something other or unknown, and calls at that time are always spooky.
Here's another: 'The old doll in the attic blinked. I ran out and never went back.' This creates a sense of unease with the simple and unexpected actions. The blinking of the doll, which is an inanimate object, is very creepy.
One story could be: 'I woke up to a strange noise in the attic. When I went to check, a pair of glowing eyes stared back at me.'
A third one could be 'I heard scratching at my window. As I peeked through the curtain, I saw a shadow with no form.' The scratching sound is a classic horror element that immediately sets an ominous mood. The shadow with no form is mysterious and menacing, leaving the reader to wonder what kind of entity it could be.
One story could be: 'I woke up to find a handprint on my window. It was on the inside.'
Here's another. 'The old doll in the attic blinked. I ran out and never went back.' This is a simple yet chilling story. The idea of an inanimate object like a doll showing signs of life is very spooky. It plays on our fear of the unknown and the uncanny. Dolls are often associated with innocence, but when they start to do something abnormal, it becomes a source of horror.
One from the list could be 'I woke up to find a handprint on my window. I live on the 13th floor.' Another might be 'The old doll in the attic blinked. It was facing the wall before.'