Ron Miscavige spent about 25 years in the Church of Scientology - he met Tom Cruise and produced music with John Travolta.Â
When he joined, it wasn't the church organisation that it is now, and it is that way, he claims, because his son, David - who heads the church worldwide - ruined it.
Ron Miscavige joins Mike Hosking to talk about his new book, Ruthless.
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