Redzone (The Mutant Files 2)

The year is 2069, more than thirty years since a bio-terrorist attack decimated the population. The world has been divided, and new nations have formed. Those mutated from exposure inhabit the red zones, while "norms" live in the green zones. In the nation of Pacifica, Los Angeles detective Cassandra Lee is in charge of investigating a disturbing case, tracking a cop killer dubbed the Bonebreaker. But strange new murders have occurred, falling outside the normal pattern and leaving Lee and her team wondering if the serial killer is no longer acting alone. To make matters worse, Lee's attention is diverted after she receives a letter from her long-lost mother. Now she must venture into the red zone, a lawless land where the biggest danger may be her own family.