Definitely fiction. Dexter is a fictional character and the storylines are made up to engage and thrill the audience. The events and scenarios presented are not based on real-life occurrences.
Probably 'Dexter by Design' is also among the popular ones. It has a great plot that involves Dexter's interactions with other complex characters and some really exciting and unexpected events.
Sure is. Dexter is adapted from the novels. The rich and complex world created in the novels was brought to life on the screen with some creative changes for the TV format.
I'm not sure specifically which dystopian novels Dave Astor has written. There could be many authors named Dave Astor, and without more context, it's difficult to pinpoint his dystopian works.
It's hard to say for sure. Some people believe they are real because they've had personal experiences or heard reliable accounts. But others think they are just fictional, made up to add mystery to the Astor name.
There could be Astor ghost stories that involve strange noises at night. Maybe it's the ghosts of servants who used to work for the Astor family. They might be making noises as if they are still going about their daily chores.