Paul Davis forgets things. Why he walked into a room, who he spoke to, and what they said. Sometimes its too much, and panic takes hold.He wasnt always like this.Eight months ago, Paul was attackedleft for dead after seeing something he shouldnt haveand he has been struggling to put his life back together ever since.Therapy helps. But at night, he hears noises. Sometimes he thinks someone is in the house. He hears the eerie clickety-click of the antique typewriter his wife bought him, as if someone is vigorously tapping the keys.Either hes losing his mindor someone wants him to think he is. Or maybe something even darker is waiting downstairs . . .