The book is based on interviews with a Jew who was forced to tattoo other prisoners at Austwitch. The amount of people who survived these camps has now dwindled, so fantastic to try and preserve this history. Although nothing particular to fault with the book, I did not feel it reached full potential given the incredible story.
If the book was not based on reality it would seem unbelievable. I felt it lacked the feelings associated with the events. Perhaps it would have more effective written in first person rather than third person it is written in, to convey more emotion. The reason for it being written this way was that it was originally written as a screenplay then turned into a novel therefore, written factually if the events without the emotion.