The Butterfly House

In Engberg’s well-crafted sequel to 2020’s The Tenant, Copenhagen homicide detective Jeppe Kørner investigates the murders of three people connected to a now-closed teen psychiatric facility, the Butterfly House. Each victim was drained of blood and left floating, two in Copenhagen fountains and the third in a lake. Since Jeppe’s partner, Det. Anette Werner, is on maternity leave, the low-energy Detective Falck, one of many well-drawn supporting characters, assists him in tracking down surviving staff members and patients. One patient’s suicide and a staff member’s mysterious death years earlier provide motives, and the behavior of many of the potential suspects/victims suggests they could all be guilty of something. The stakes rise as Anette, restless at home, starts investigating on her own. Readers will be pleased to see Falck playing a heroic role at the climax. By addressing the issue of society’s treatment of the mentally ill, Engberg brings the complexities of life into this superior Danish police procedural. Fans of Scandinavian noir will hope this series has a long run. Agent: Federico Ambrosini, Salomonsson Agency (Sweden). (Jan.)