Carolyn, I would also recommend reading "Thinking Critically About the Kennedy Assassination: Debunking the Myths and Conspiracy Theories" by Michel Jacques Gagné (https://www.goodreads.com/book/show/61668209-thinking-critically-about-the-kennedy-assassination) OR (https://www.youtube.com/watch?v=qLueJPOpdkU)
that summarily debunks MOST such conspiracy theories (one of which is presented in the book that you are currently reading).
Carolyn, I would also recommend reading "Thinking Critically About the Kennedy Assassination: Debunking the Myths and Conspiracy Theories" by Michel Jacques Gagné (https://www.goodreads.com/book/show/61668209-thinking-critically-about-the-kennedy-assassination) OR (https://www.youtube.com/watch?v=qLueJPOpdkU)
that summarily debunks MOST such conspiracy theories (one of which is presented in the book that you are currently reading).