A Stranger in My Grave - Margaret Millar

A nightmare is haunting Daisy Harker. Night after night she walks a strange cemetery in her dreams, until she comes to a grave that stops her in her tracks. It's Daisy's own, and according to the dates on the gravestone she's been dead for four years. What can this nightmare mean, and why is Daisy's husband so insistent that she forget it? Driven to desperation, she hires a private investigator to reconstruct the day of her dream death. But as she pieces her past together, her present begins to fall apart...