Throughout the 1980s, annual sales of the book steadily increased each year; however, the largest growth in sales occurred in 1992 after Marianne Williamson discussed the book on "The Oprah Winfrey Show", with more than two million volumes sold. The book has been called everything from "New Age psychobabble" to "a Satanic seduction" to "The New Age Bible". According to Olav Hammer, the psychiatrist and bestselling author Gerald G. Jampolsky has been among the most effective promoters of the Course. His first book, "Love is Letting go of Fear", which is based on the principles of the Course, was published in 1979 and, after being endorsed on Johnny Carson's show, went on to sell over three million copies by 1990.