This encyclopedia gives a brief overview depicting the history and transformation of the meaning of the Prince of Darkness, and 300 entries cover subjects like the angel of death, backward masking (messages revealed when songs are played backward), neopagan witchcraft, UFOs, and The Satanic Bible. Extensive appendixes include the l992 FBI study of satanic ritual abuse, the most influential document ever written on the subject, as well as sample satanic scriptures and a satanic wedding ceremony.