Thirty years ago, ecstasy and torment took hold of John Rivers, shocking him out of half-baked imbecility into something more nearly resembling the human form. He had an affair with the wife of his mentor, Henry Maartensa pathbreaking physicist, winner of the Nobel Prize, and a figure of blinding brilliancebringing the couple to ruin. Now, on Christmas Eve while a small grandson sleeps upstairs, J...