Ruby is a licensed therapist, so she understands and rationalizes that while she has killed three people, she is not a sociopath. She is a kind and loving and empathetic human being. Perhaps because she is such a kind and caring person, she has convinced herself that she has done nothing wrong because the three people she killed were truly vile and evil. But she is now suspected of killing her husband – a person she loved and who was a kind and caring person. I loved every minute of this cleverly written book. The story is told from Ruby’s point of view and the author does an incredible job making her a really likeable character despite the fact she freely admits (to herself) that she is a murderer.