This is actually a 3 volume list of books: a text, a workbook plus a teacher's guide, which i browse from continuously, and also have to the previous 31 yrs. It has become the most vital spiritual messages of our time. The Course combines 21st Century psychology with non-dualistic metaphysics. https://www.youtube.com/channel/UCXpL4OXSmktqlP6_S5p5jIQ