It is with a heavy heart that I pick up anything to do with the Holocaust. Not because it’s wearisome or too familiar, or because — in Solzhenitzyn’s memorable phrase — you need only a mouthful of seawater to know the taste of the ocean. No: my reluctance to contemplate that world, even as a distant spectator, is because it was so awful and the detail so compelling that I’ll be unable to put the book down.