While this story of ancient evil recurring again to kill is interesting it doesn't really fit in my mental picture of the series starring Maura Isles and Jane Rizzoli. It's almost as if Ms Gerritsen had a story to tell and hung it on this series. The story is of a series of strange murders, seemingly focused on a small but strange group of people, the Mephisto club, a group who have a lot of power and influence. Their theories about the murders don't fit well with Jane's worldview and other issues flare in both Jane and Maura's worlds. It's not a bad read but somehow it felt like a story Ms Gerritsen wanted to tell and used this series as a prop, but it's a prop that doesn't quite flow as well as it might.