User summary: While several earlier DemonWars gaming products were produced for the d20 OGL 3.5 Version, this product presents a new and unique mechanical system to support play in Corona, the setting detailed in the novels. The system is somewhat similar to the d20 system but varies in significant ways and is not produced under the OGL. The book presents the core rule system, substantial setting information, and a selection of monsters derived from the novels. Also included is an introductory adventure module and a novella.