This book is a very interesting read, featuring first hand accounts of the Holocaust. The fact that the book is entirely primary source materials makes it all the more interesting. These are the words of the men who did the deeds and their reaction to it. The book uses letters, diaries, interviews, reports, and all kinds of other materials for sources. It is an interesting read, but the only reason I give it 4 stars instead of 5 is although it is a great source, some of the chapters are rather dry, but overall the book is well worth the read.