In broad daylight, Herbert Mullin calmly placed a rifle on the roof of his car, took aim at Fred Perez, and pulled the trigger without flinching. The fatal shot rang out, causing panic as a witness frantically called the police. Compelled by the voices in his head, Mullins believed that human sacrifice would prevent a massive earthquake from striking California. No one was safe. Over a span of four months, Mullins brutally killed men, women, children, and a priest, without any hint of remorse. Could anyone stop him in his quest for salvation? I Hear Voices is a chilling account of Herbert Mullin, one of the most terrifying serial killers in American history. Ryan Green's riveting narrative draws the listener into the real-live horror experienced by the victims and has all the elements of a classic thriller.