This is a factual, readable, and thought-provoking book about Mengele's twin experiments at Auschwitz. I was VERY frustrated that in all of the photos in the book, there was not one of Mengele himself. There was a lot of description about his appearance, but no picture of the man. Also, while the post-war stories of the twins was fascinating, the actual "experiments" performed were not described in any detail. The horror of the man and his actions is real, but why he was so horribly depraved is glossed over or never mentioned. Why did some of these twins die? What had he done to them? The author never says, probably in an effort to appeal to a wider audience. What is here is good, but there is just not enough here. Some of the photos of twins in the book are never connected to text telling their stories.