Written to fill the gap in available knowledge on trance, prophecy, deity-possession and mediumship within the neo-Pagan and Wiccan communities, Lifting the Veil has been developed from Janet Farrar and Gavin Bone's personal work and public workshops on trance-prophecy and ecstatic ritual over 25 years. The book covers the history and modern practice of trance as well as the methods of practice.

It also explores the four keys to trance-prophecy, which include the importance of understanding mythical cosmology and psychology, understanding the role of energy in trance, the nature of spirits and deity, and understanding what trance is and the techniques involved. Because trance-prophecy is a very subjective process, the book includes descriptions of the personal experiences of others and transcriptions from several independent sessions by modern seers and priestesses.