NEW YORK TIMES BESTSELLER It came in a plain brown wrapper, no return address--an audiocassette recording of a horrifying, soul-lacerating scream, followed by the sound of a childlike voice chanting: "Bad love. Bad love. Don't give me the bad love." For Alex Delaware the tape is the first intimation that he is about to enter a living nightmare. Others soon follow: disquieting laughter echoing over a phone line that suddenly goes dead, and a chilling...