4 weeks. $100. This course is an introduction to basic Christian beliefs and how one ought to live out the Christian life for the glory of God. The course is divided into four weeks according the the four sections of the book, Mere Christianity. One section a week will be required reading for the class, along with supplemental online material provide by the course instructor. Required reading: Mere Christianity by C.S. Lewis, plus additional online material provided by the Instructor.