Wow, what fantastic nonfiction storytelling. I didn't know a thing about the subjects, and was both horrified by the depth of human depravity experienced by so many men, and also amazed at the final-final act of the story (this one has at least 5 acts, and would have been a great book after the traditional 3rd act).

Very worthwhile in audiobook form also.

I won't say more, because the story builds so well that it should be experienced, even if I'm way too late to spoil it.