Alien Shifters — Amanda Close

Something deadly has awakened inside the penal mining colony Pit 13, and it wants out. The Thing that lives inside one of the convicts has entered a new phase in its evolution. Hanna, a beautiful yet criminally insane convict, must face the grim reality of doing hard time in a co-ed prison. Warden Anastasia Coulter will be forced to cope with the aftermath of a grisly uprising and an alien breeding frenzy.