I'll bet it's the police discouraging these guys from writing these books. Probably why the Lanza's Mob author didn't have much since the DeJohn murder. Bay area law enforcement is gung ho about supposedly not allowing the mob there.
Vacari, also been meaning to ask. What do you know about Bones Remmer, the man in my profile pic? I bought an ebook about the history of the mob in Reno, which is kind of lame, but there was a lot about him. I know he was a big bay area guy.