Meet Contestant #5, a Thriller!

A bit about this contestant:
Contestant #5 has a bit of a dark side. Part of them is still stuck in the 1980s while part of them is here in the present. Good news, they own a mansion. Bad news, you may not leave it alive. Are you up for a sinister game?

The first words they'll say to you (a snippet from the first page):
July 1988
The house sat on a gentle rise in the otherwise flat landscape, as if it considered itself a castle in this kingdom of marshy scrubland and water channels and rustling green fields. Pale gray walls, broad steps rising from neat gravel to the front door, row upon row of gleaming square windows and –
     “Is that a turret?“ I craned my neck through the passenger window. “Is this whole place really just for three people?”
     “Four, if you behave yourself.” Caroline jerked the steering wheel to swing us onto the driveway, bumping me back into my seat.