Maybe it's a title. However, it doesn't seem like a typical title as 'a st skin novel' is not a common or easily understandable phrase. It might be part of a more complex or experimental title, where the author is trying to convey something very specific or abstract. If it is a title, it would probably require a lot of explanation or backstory to make sense to the reader.
I'm not entirely sure what 'a st skin novel' means. It might be a very specific or misphrased term. Without more context, it's difficult to give a precise explanation of this phrase.
The story of The Sinner mainly focuses on uncovering the hidden motives and past traumas of a seemingly ordinary person who commits a shocking crime out of the blue.
No, 'The Sinner' is not based on actual true events. It's a fictional drama crafted to entertain and engage viewers with compelling storylines and complex characters.