It really is a cult book in the same way that "Belle du Seigneur". The torrid love Nathan and Sophie, can be compared with that of Ariane and Solal. Doomed to failure because there is no power except by violence. It will serve as the narrator sexual initiation.
Nathan violence, including schizophrenia is evident and one that Sophie suffered in the camps and now part of his life. The difficult choice is hers is terrible! how does one let live her children ?? It is a book we do not forget.