The Walking Dead Vol. 6: This Sorrowful Life TPB

The world we knew is gone. The world of commerce and frivolous necessity has been replaced by a world of survival and responsibility. 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: no government, no grocery stores, no mail delivery, no cable TV. In a world ruled by the dead, the survivors are forced to finally start living.
Trapped in a town surrounded by madmen, Rick must find a way out or die trying. Meanwhile, back at the prison, the rest of the survivors come to grips with the fact Rick may be dead, and a major turning point in the series is reached.