The Walking Dead, Vol. 3: Safety Behind Bars Collects issues #13-#18. An epidemic of apocalyptic proportions has swept the globe, causing the dead to rise and feed on the living. In a matter of months, society has crumbled: there is no government, no grocery stores, no mail delivery, no cable TV. In a world ruled by the dead, we are forced to finally begin living. This volume follows our band of survivors as they set up a permanent camp inside a prison. Relationships change, characters die, and our team of survivors learn there's something far more deadly than zombies out there: each other.