SEATTLE — True-crime writer Ann Rule signed a contract to write a book about an unknown Seattle serial killer six months before he was identified as her co-worker Ted Bundy, who shared the night shift at Seattle’s Crisis Clinic. The woman credited by her publisher with reinventing the previously male-dominated true-crime genre by focusing on the victims has died at age 83. Rule wrote more than 30 books, including “The Stranger Beside Me,” which profiled Bundy. Rule and Bundy met in 1971 and their relationship was mostly a grim coincidence, except that he later confessed to eight murders in the state of Washington. The FBI says Bundy started to kill attractive college students in Washington state around 1974 and was first arrested in 1975, but he later escaped and continued killing. Bundy was executed in Florida’s electric chair in 1989 for the 1978 rape and murder of a 12-year-old girl.