Your Nemesis, by BA McHallam
During Detective Inspector Kim Russo's investigations into burglaries of high-end jewellery, a body is discovered locked in a bank vault. DCI Gary Stone is appointed Senior Investigating Officer.
The death count rises when a man’s body is found in local woodland. A few weeks later, DCI Stone and DI Russo are called to an empty, neglected manor house where a local estate agent has been found dead at the foot of the stairs.
Kim’s mother has received several menacing letters, all with details of the death and all signed – Your Nemesis. The police need to work fast to discover the identity of the letter writer as Kim and her mother are next on the list of Nemesis.