I tried to find a .pdf file of the updated book, but all I could find was the original paperback, which still has information on Bill Mentzers relationship to Manson via The Process Church of Final Judgement.
More than that, it's a great True Crime book that pretty much proves that David Berkowitz didn't act alone in the Son of Sam murders.
Here is the pdf file for the original paperback:
As an extra, I uploaded an A&E Investgative Reports Documentary about the case to my other YouTube Channel. I don't think there's any Manson information in the Documentary, but it's pretty interesting anyway...