Thriller about the murder suicides of two different families and the detective who tries to figure out whose done it. The clues lead them to a psych ward and a nurse who works there, and of a kid who has stabbed his mother being treated there. The story also lends itself to a self help guru who unbenownst to them had been treating the families by convincing them to eliminate the negative energy in their lives or "darkness" and let the "light" in. The story didn't work for me- I guess too much esp and such. Good straight-forward writer but not much of a descriptive writer.