I'm a fan of Ann Rule's work and have read most of her books. This one is particularly good, in part because it is slightly different from the usual crime-trial-sentencing formula.
"Bitter Harvest" is the story of Deborah Green, a very bright woman whose intelligence hid a fundamental flaw in her personality ... the apparent lack of ability to feel compassion. There are signs early on, which we do not fail to spot, and there's a feeling throughout of wanting to reach into the book and tell her family and friends to just get away from her! Of course in real life people can't quite believe their loved ones are actually dangerous, and here, as always, there are tragic consequences.
There is no trial in this book, which gives it space to thoroughly examine Deborah's life as she moves towards her fate. It is less sensational than some true crime stories, which makes it more poignant; it's not really about the crime as much as it is about the effects of the crime.
Very good indeed.