This is hands down one of the darkest yet most enlightening books I have ever read. It's dark in the sense of the absolute terror these deranged and evil men put onto their poor victims (though it's well explained that the majority either clearly did not act alone or were completely innocent and used as "patsies" (the "fall guy") and beaten/tortured/threatened out of a false "confession" and then given a complete sham of a "defense team" and "trial". The truth is, the mainstream media/judicial system/police forces/secret intelligence agencies/etc are all complicit in the propaganda and lies behind what a TRUE "Serial killer(s)" is.
The truth of the matter is that whatever you are told by the Police and mainstream media are complete lies and are nothing based in reality. The FBI/CIA/etc do so much more behind the scenes than we'll ever truly know and it's all a LIE. This book is the biggest dose of the "red pill" you'll ever take (Matrix reference). Once you finish this book you will never look at watching mainstream media the same again and your perspective in general changes. Just beware of the horrific material you will read and learn of. It's stuff of nightmares and the most grisly stuff you can ever imagine.