United States of Z

Protocol 9 was designed as the ultimate safeguard—a top-secret government program to counteract viral outbreaks or chemical weapon attacks. But no one expected to use it: until something turned the population cannibal. For Special Operations soldiers finishing their tours of duty, signing on as Protocol Agents seemed like easy money—a cushy contract with no real danger. But when civilization collapses and the streets run red, they realize they've been recruited as humanity's last line of defense against a nightmare they never saw coming. Protocol 9: when survival becomes the mission.