Authenticity

In Maus, Art Spiegelman portrayed the Holocaust in a very unique way.  He write this story as a graphic novel with the Germans as cats, the Jews as mice, and the Poles as pigs.  I found this to be very effective because it shows us how the people thought of each other in that time.  Although everyone in the story is a human, Spiegelman depicts them as different species.  The jews were no different from the Poles. A lot of the Jews were Poles, but it just showed how the Nazis saw them as different from themselves, as inhuman because of their religion.
Additionally, Art Spiegelman did not only tell the story of his father in the Holocaust, but he also included the stories of his visits with his father.  It shows the readers not only the man he was during the war, but also the man he became afterwards.  The readers get to see how the war affected Vladek even many years later. It completely shifted his personality and changed him from this kind loving man to a sad stingy one. 
Lastly, I really enjoyed how accurate Spiegelman was with his father's words.  While reading, I can hear his fathers accent by the way he phrases sentences.  I could really connect with it because it reminds me of the way my exchange student speaks English.  The translations arent always the same between languages and Spiegelman does a great job of capturing that.  It makes the story feel more authentic.