The Religion of L. Ron Hubbard's Church of Scientology: The Cult of Tom Cruise, John Travolta, and Lisa-Marie Presley by Robert Alan King is a booklet with over 5,600 words. It explores the religious tenants of the Church of Scientology to arrive at a basic understanding of what they believe. Though the book also sometimes conveys the contrasting beliefs of Christianity, the real focus is on understanding the theology of Scientology itself. In addition, King briefly explains what Scientology is and then discusses whether or not Scientology is a cult. The book mentions some famous Scientologists such as Tom Cruise, Katie Holmes, John Travolta, Lisa-Marie Presley, and Paul Haggis, but this is only in reference to actions or claims that are relevant to the theology of Scientology. Robert Alan King is an ordained minister through Calvary Chapel.