Premise: Ann Rae Rule (née Stackhouse; October 22, 1931 – July 26, 2015) was an American true crime author of "The Stranger Beside Me", about serial killer, and Rule's co-worker, Ted Bundy. Rule was also known for her book "Small Sacrifices", about Oregon child murderer Diane Downs. Many of Rule's books center on murder cases that occurred in the Pacific Northwest and her adopted home state of Washington.
Hypothesis: Ann Rule began publishing books while still in her 30s