Our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.  –Ephesians 6:12

Kurt Koch, Occult ABC.

John Weldon and Clifford Wilson, Occult Shock and Psychic Forces.

Gary Bates, Alien Intrusion (book and DVD): the most thorough Christian response.

Erich von Däniken, Chariots of the Gods.

Unsolved Mysteries: UFOs (DVD set).

Unidentified (Christian movie, 2006).