I am reading Zebra now and REALLY find it compelling. I started it Thursday and may finish it tonight. I can't remember a book I found this hard to put down since I read Helter Skelter 45 years ago.Having finished Moshe Pearlman's book on Adolf Eichmann a couple of weeks ago, I then read Clark Howard's book Zebra. It is the story of the Zebra murders in San Francisco in the early 1970's.
The story is not too well-known especially in today's media culture, because it details a series of Black-on-White racially-motivated attacks.
This is a link to it. Some of the language is extremely vulgar, so be warned.
https://archive.org/details/Zebra-Clark-Howard/mode/1up