Tricky! I was kept on my toes by this book and there were several points along the way that I didn‘t see coming. I will say that the overall premise was different from what I thought from the blurb on the back. It‘s not a psychological drama, like a gaslighting situation. People DO believe Fiona when she claims she used to live there. The mystery is how did her house come to be sold without her knowledge, and that takes 400 pages to unravel!