What is the theme in The Demonologist: The Extraordinary Career of Ed and Lorraine Warren by Gerald Brittle?

Good vs. Evil is another theme in the book. With a plot revolving around demons, the idea of good vs. evil is impossible to miss in this book. The evil of the equation is represented by the spirits that are battled by the Warrens, and though the actions of human beings within the book, whether purposeful or not. As one uses a Ouija board, automatic writing device, conjuring candle, ritual, magic mirror, or any other form of occult material, he or she participates in a negative activity. Such negativity is increased as infestation of spirits occur, in that the family begins breaking down through arguments, fights, a lack of trust, and an overwhelming sense of depression. The spirits themselves are often inhuman,