In the previous volumes, the action took place during the Vietnam war as the army fought off zombies as well as the Viet Cong. In the first story, we’re in Pennsylvania in 1968 and zombies are emerging from the graveyards. In the second, the same problem is starting off amongst draft-dodgers in Canada. The third story takes place in San Francisco and involves the Zodiac killer.
Having read previous volumes, these are getting quite boring. Basically it’s zombie-killing in different contexts but nothing more than that.