Review: Books 0-3 are a solid series where survivors fight not only zombies but "agents" who are trying to finish off anyone immune.
Rating: 3 out of 5
Date: 05 4, 2014
They story is of a man made virus started by a psychotic man who introduced it into the food and water systems starting in the southwest.  The twist is the psycho has created a group of "agents" who are sent out to kill any of the survivors in that are immune to the infection.  The characters are battling both the zombies and the agents in an attempt to survive.  Two of the survivors who were brought together through an interesting sub-plot even decide to attack the base of the agents in Salt. Lake City.  Overall a worthwhile read but not quite as good as some of the series.