This is the fourth book in the brilliant DI Gareth Gravel series. Grav is on extended sick leave following another heart attack when the daughter of an old family friend contacts him for help. Mia is a successful novelist, recovering from cancer and a broken relationship and now trying to forge a new life with her young daughter Isabella. All is well until she starts to receive strange then ever threatening emails from "her number one fan". When Grav's daughter Emily is also threatened he is forced to involve his colleague Acting DI Laura Kesey as Mia begins to fall apart and people start dying. We know all the way through who the killer is. The author gives us plenty of insight into the mind of this deranged personality as the tensions builds in the race to catch the perpetrator and prevent any more deaths. I loved the book and I wish there were more in the series. Another cracking read!!