A Fantasy Role-Playing Game Supplement User summary: The Fourth Book: Arcane Wisdom recreates the TSR's commercially produced eponymous supplement for the DragonQuest game in a publicly available format that is distributed for free. Note the rules follow the original section/paragraph numbering scheme, and only the critical rule sections are provides (e.g., no explanatory or flavor text are included). This supplement begins with rule 89 and ends with 97. The magic system presented here varies in small ways from the DragonQuest system, primarily in the details and not the broad vision.