Very emotional and pessimistic, especially the end. The author spares us from drastic details and depictions of death by the hands of Nazis. But you don't need them to understand the scope of tragedy of that time. Time where one decision or one turn could save a life or end it tragically; time where heroes were scarce and even those hunted couldn't find it in themselves to sacrifice their own life to save others. But would we? That is the question no one knows the answer until they find themselves in such a position to make the choice. I don't know if I would be brave enough to risk my life to save others at such times. I want to think that I would but ... that is easy to think so now in the world of general safety (at least in the parts where I live).
It's one of those books people need to read to always remember what people are capable of and to do everything in our power to not repeat the history.