By Mark Shaw. A fairly well-known conspiracy tome that I don't think I realized was a follow-up, not a standalone -- and "continues the mystery of why, how, and by whom celebrated TV star and media icon Dorothy Kilgallen was murdered in 1965." Kilgallen had gotten into it with Frank Sinatra AND blown up the Warren Commission's spot re: Jack Ruby's testimony, so I think Shaw's angle is that the fatal mixture of booze and pills that caused her death was in fact power silencing her.
I've not read either of these -- I couldn't get through Shaw's book on Joe Kennedy's role in the JFK assassination -- but these are new from the warehouse. (Thanks to some bumps in transit, I've dropped the price.)