AC Summer Reading 2015- The Book Thief

I am only 101 pages in, and I am already loving this book. I've had this book in my home library for over a year but I never read it because I thought it looked boring. Even when I was only 5 pages in, I couldn't find it in myself to put the book down. Despite only being in Part Two, my favorite section so far was the prologue due to the point of view and the way the content was phrased. I also agreed when he argued that white was a color, because I remember last year in Tech Ed we were arguing about that same topic. It took the entire class period, and we still hadn't come to a conclusion. I am still confused as to WHAT he is in the prologue. He speaks about taking peoples souls and watching them, but he never cordially informed readers as to who he was. It just irks me that he is involved in my favorite section of this book yet I dont even know who/what he is.