Excellent third installment in the series. There is really no point in reading this book (or review) if you haven't read the first two stories.
Juliette has taken over as Sheriff, and Bernard from IT has taken over as mayor. Juliette, in investigating the previous mayor and sheriff's deaths, uncovers deceit. I loved how her former friends in Mechanical help her out, even as she ends up with her own problems, and we learn more about the world at large.