A Suitable Vengeance by Elizabeth George

In this gripping mystery, Detective Inspector Thomas Lynley and his partner, Sergeant Barbara Havers, find themselves embroiled in a complex web of secrets and lies when a murder disrupts the tranquility of Lynley's family estate in Cornwall. As they delve deeper into the investigation, they uncover hidden tensions and long-buried resentments among the local community and Lynley's own family. With each revelation, the line between friend and foe blurs, challenging Lynley's loyalty and testing Havers' resolve, ultimately leading to a shocking and unexpected conclusion.