Johnson Killed JFK?

'Jackie Onassis believed that Lyndon B Johnson and a cabal of Texas tycoons were involved in the assassination of her husband John F Kennedy, ‘explosive’ recordings are set to reveal.
The secret tapes will show that the former first lady felt that her husband’s successor was at the heart of the plot to murder him.'
I bought a book many moons ago which made a very good case for this particular scenario. I have searched and searched for that volume for over 20 years with the intention of rereading it - but - oh dear. Can't find it anywhere!
Read more: http://www.dailymail.co.uk/news/article-2023418/Jackie-O-tapes-reveal-JFKs-affairs-believed-death.html#ixzz1UPhscRiB