And yet immediately we heard arcane details about Lee Oswald's life. I've got to find that book you recommended "Heritage of Stone". Thank you.
The last word must be given to Jack Ruby. Whether he directly fingered Lyndon Johnson as the guiding force in Kennedy's murder and therefore the coup d' état is up for debate. When Jack Ruby was asked in his jail cell who killed John Kennedy, he cryptically responded by saying read J Evetts Haley's book. Although he didn't name the book, he was referring to A Texan Looks at Lyndon. If one reads the book, one will not find any references linking LBJ to the murder of JFK. What one does find interesting is that on March 27, 1952 a good friend of Lyndon Johnson was found guilty of first degree murder by a jury in West Texas. Attached to the verdict was a five-year suspended sentence. Jack Ruby attempted to make the broader point that in Texas political power can make all things possible even getting a way with murder.
The book referenced can also be found on the internet archive.