A Course in Miracles

A Course in Miracles (also referred to as ACIM or the Course) is a book written and edited by Helen Schucman, with portions transcribed and edited by William Thetford, containing a self-study curriculum to bring about what it calls a "spiritual transformation". The book consists of three sections entitled "Text", "Workbook" and "Manual for Teachers". Written from 1965 to 1972, some distribution occurred via photocopies before a hardcover edition was published in 1976 by the Foundation for Inner Peace. The copyright and trademarks, which had been held by two foundations, were revoked in 2004 after lengthy litigation because the earliest versions had been circulated without a copyright notice.

Schucman believed that an "inner voice", which she identified as Jesus, guided her writing.

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", "a Satanic seduction", to "The New Age Bible".