from the Preface: This is a companion volume to the original Enemy Within campaign for the first edition of Warhammer Fantasy Roleplay. It is an unofficial document and is not authorised or endorsed by Games Workshop. Insofar as it refers to Games Workshop’s intellectual property, it does so without permission. No challenge is intended to the rights holders. The objective of this volume is to provide gamesmasters with assistance in running the campaign. That assistance falls into two broad areas. First, background material, such as synopses, indices and chronologies, provides greater explanation of the published material. Second, supplementary material expands and modifies the original texts. The extent of this has been deliberately limited. This is in part because The Enemy Within is already a long campaign. However, it is also attributable to a desire to preserve the campaign’s original character. With the same purpose additions have been composed, where possible, of material by the campaign’s original authors. The background and rules are assumed throughout to be those of the first edition of WFRP. However, discussion of specific game mechanics has been intentionally brief, which should enable the material to be used more easily with other editions of the game.