David Miscavige, the Church of Scientology's current leader and successor to founder L. Ron Hubbard, hasn't always ruled with a dictator's iron fist - nor was Scientology even part of his destiny. It was his father, Ron Miscavige, who signed his family up, and David bought in totally, even as a boy. Years later, Ron could only watch with dismay as his bright, carefree son transformed into the ruthless leader he is today. Ruthless is David's story told by the person who knows him best - his father. Ron traces the arc of David's life from his early years to David's eventual, stellar rise to power in Scientology; his brutal approach to running the organization today; and the disastrous effects that his leadership has had on countless numbers of Scientologists and their families.