Trick or Treat — Caroline Crane

Life has been good for the three Lonergan's, until one tragic Halloween when young Patty dies from poisoned candy. Her grieving father, Brian, swears he will find the murderer. He starts with the Freaney family across the street, in whose house his daughter died. Then more deaths occur. The culprit wasn't candy but ordinary sugar tainted with a powerful poison. The police do their best, but Brian wont let go. He is obsessed with tracking down the killer. His wife, Theresa, shrinking from more violence, tries to stop him. She does not tell him her terrible secret. She is haunted by a man named Michael, a man she never sees but only hears. Is he real? A hallucination? Who is he? Then there are the hours that vanish from her days. What does she do and where does she go in those times she cant remember? Her life may depend on finding the answers. Their neighbor, Leonard Freaney, holds a piece of the puzzle, a piece that could shatter Theresa forever. This psychological thriller rushes toward a startling climax as Theresa, having discovered Michaels identity, fights for her life, and Brian learns the truth of his daughters death.