I think this may be my favorite of the series. This one is about Martha who is married to Alan, a traveling salesman and she suspects of him of killing women. As a result, she reached out to Lily for help. Martha and Lily are friends that have lost touch and I love how Lily was introduced to this story. The story has so many layers of twists and turns and I love that Henry is also back in the story. I highly recommend reading the first 2 books to get a feel of Lily. 

I enjoyed the multi cast of narration as well.