All three novels revolve around two brothers, Claus and Lucas. They are twins. Perfect reflections of one another. In The Notebook, they are abandoned at their grandmother’s during a brutal war (presumably World War II) in their country (presumably in Europe) and, using a notebook, they practice hardening themselves against outside threats and internal ones as well.
Diana Athill’s After a Funeral details her experience of being friends with a man who is profoundly destructive both to himself and to everyone around him.