From the back of the book:
Sometimes the dead don't stay in their graves. They claw their way out, motivated by revenge, love, sorrow, or simple bloodlust. Putting them back isn't as simple as bullet in the head--it requires understanding what brought the corpse back to our world in the first place.
Undead is an antagonist sourcebook for Chill Third Edition. It includes detailed discussions of the various types of undead creature, from the comparatively simple revenant to the mysterious and horrifying zombie masters. It also includes new pregenerated characters, new Edges & Drawbacks, and Dead to Rights, a case that can be integrated with an existing Chill campaign.