Sam Knight reminds the reader, I’m not just making this up. I believe him. I love this kind of wacky stuff and read it in one go. But when Knight tells the reader what psychiatrist John Barker was thinking about when he was flying into New York in the mid-sixties, he’s writing fiction. It’s the kind of world Stephen King writes about and asks questions like how can we know what we do not know? In one of King’s novels, the protagonist sets out to...