How to Kill a Small Group

Unraveling the mystery of three invisible killers

Would you pass the butter, please? Phil asked, as he checked the clock on the kitchen wall. His wife, Janice, handed it to him and asked, "How'd you sleep last night?" Phil chuckled as he buttered his English muffin. "Not well. I had the weirdest dream, the kind that leaves you feeling uneasy—like you've done something wrong but don't know