This was a very sobering book to read, especially now. The story is purportedly drawn from an abandoned logbook, but the author, a famous explorer, Ranulph Fiennes -(climbed Everest 3 times, related to the actors -cousins), attempted to check out names and dates and was not able to do so. His failure to trace the victims, however (he was able to trace many of the Nazi names) is understandable in light of the lost lives and the poor records.
I listened to this on CD in the car, which was helpful, as I was able to skip over a bit of both the horrible-unbelievable- Holocaust cruelty and the Rwandan genocide atrocities. The horror is so intense it is difficult not to skip some of it. It is interesting that I first read about the Hutus and the Tutsies reading H Ryder Haggard's King Solomon's Mines when I was about 12. The tribes are still fighting (I'm 76), despite the fact that the Dutch once paid for a genetic study of the tribes that found almost no genetic differences-not surprising, as they have inhabited the same area for centuries and no doubt interbred. Man inventive in thinking up reasons to hate others.
I looked up a few things from the book to get another viewpoint; the collaboration of the Ukrainians, Poles, and Lithuanians and others with the Nazis, either out of fear, or in agreement with the elimination of Jews, the crippled, mentally disabled, Gypsies and others. This is true---to different extents in each area and for each population.
The idea that German Jews considered themselves loyal Germans before the war and lived side by side with their neighbors with little idea that their friends would turn on them was harder to look into, but as Jews before the war were in all areas of society, it seems likely.
I had once read, but did not quite grasp that converting to Christianity did not save Jews that were not religious and did this. Hitler wanted to see 3 generations of "pure" Aryan blood and meticulous record checking was done.
This is worth a read in this disrupted world, but steel yourself.