What is the author's tone in The Demonologist: The Extraordinary Career of Ed and Lorraine Warren by Gerald Brittle?

The tone of the book also changes throughout the book. For the most part, the tone is one of instruction, as the Warrens seek to impart information about terminology and specific circumstances seen in demonology. They explain each term used in depth, and give a vast history for many of the rites and rituals they firmly believe in.