Trouble in Paradise: The Decline of Christianity in the 21st Century---is a comprehensive look at the world's largest and most dominant religion today. Data and theories are also presented on what Christians believe and why, issues on interpreting the Bible, factors responsible for Christianity's social decline, the Trinity concept, efficacy of prayer, and the character of Christ. Also included are how science has dealt with Creationism and Intelligent Design, and how U.S. Courts have dealt with legal issues regarding separation of church and state. There is also a critique of religious beliefs versus rationality, and answering the big question: Does God Exist? Answers are provided as to how to lead a moral and ethical life, and suggestions for lifelong values from a Pantheist perspective. In Appendix A, a useful tool is provided---Understanding Logic and Reasoning.