Over the years we've heard a lot about the Church of Scientology.
It's high profile has been bolstered by Hollywood A-listers. But what goes on behind the walls of this religion isn't always glamorous.
The Church of Scientology is led by David Miscavige, a man who usually prefers to stay out of the public eye.
But now his niece has shone a bright, unwelcome light upon the Church of Scientology and its behaviour.
Jenna Miscavige Hill spent more than 20 years in the Church of Scientology with her uncle. She told her story to Liz Hayes.
Jenna's book is called Beyond Belief: My Secret Life Inside Scientology and My Harrowing Escape and was published by William Morrow Publishing.
Reporter: Liz Hayes
Producer: Phil Goyen
60 Minutes. 2013-06-09