When Erin, Caitlin's mother, discovers her daughter can control a demon, she is outraged. In her mind, only a Great House has the right to such power, but who will listen to a poor Irish woman? House Lowell will. For Alice Lowell has inherited an old Puritan journal which describes how to find and enslave a demon, but she needs a psychic to do it. Kidnapping Caitlin is the first step in a plan to rid her husband's House of debt. But with a demon to do their bidding, her ambitions will be limitless. The Book of Demons can be read as a standalone story, but also acts as a continuation of the hit comic "Boston Metaphysical Society: Ghosts and Demons."