Nik Ripken is the world's leading expert on the persecuted church in Muslim contexts. He is a missions veteran of 30 years, having served primarily in North Africa and the Middle East. He is the author of "The Insanity of God "and the new book "The Insanity of Obedience". He and his wife have done extensive research on the persecuted church, and on Muslim background believers, in approximately 72 countries.