Book excerpt: One day can change a person's life forever.Alissa anticipated a normal shift at Mass General Hospital until the zombie outbreak spread through Boston like wildfire. When patients and staff in the ER die, reanimate, and attack the living, Alissa must fight her way to safety to avoid becoming one of the ravenous horde. To survive, she must develop instincts and skills she did not realize she had within her.Escaping the hospital was one thing, but can Alissa survive the nightmare gripping Boston and make it out of the city to safety?