JFK and the Unspeakable: Why He Died and Why It Matters is a book by theologian and Catholic Worker James W. Douglass (Orbis Books, 2008; Touchstone Books, an imprint of Simon & Schuster, 2010) that analyzes the presidency of John F. Kennedy as well as the events surrounding his assassination. The book is drawn from many sources, including the Warren Report. The book's central thesis is that Kennedy was a cold warrior who turned to peace-making, and that as a result he was killed by his own security apparatus.

Published by the Maryknoll Fathers and Brothers, it received an award from the Catholic Press Association and coverage in the religious press; sales shot up after Oliver Stone recommended the book, with it featuring in Amazon.com's Top 100 for a week. The 2013 edition of the book was endorsed by Kennedy's nephew Robert F. Kennedy Jr., who said it had moved him to visit Dealey Plaza for the first time.