Book excerpt: People are inexplicably disappearing from Chicago prosecutor Jess Koster's life. Eight years ago, her mother vanished without a trace and now a client, the victim of a brutal, sadistic rapist, is also missing. Someone is disrupting Jess's neat, ordered existence with chaos and terror. And from the shadow of her past, a maniac is watching her, stalking her - and there's no one Jess can trust, for she feels with blood-chilling certainty that her mysterious tormentor is perilously close . . . and that the next missing person might be her.