Max Porter’s first book, Grief is the Thing with Feathers (2015), got a lot of credit for finding original ways to talk about two of the oldest subjects under the sun: human love and human death. It’s hero is a young father writing a book about Ted Hughes, whose distress at the death of his wife, and whose efforts to look after their two children, are shaped by the appearance in his life of Hughes’s celebrated figure of the Crow, a real/metaphorical creature who is on the one hand disgusting, violent, abusive, anarchic and gloating, and on the other bracingly...