Book excerpt: The fourth investigation in the nationaly bestselling Swedish detective series Irene Huss is a former jujitsu champion, a mother of twin teenage girls, the wife of a successful chef, and a Detective Inspector in the Violent Crimes Unit in Göteborg, Sweden. And now she’s back in the gripping follow-up to Detective Inspector Huss. One nurse lies dead and another vanishes after a local hospital is hit by a blackout. The only witness claims to have seen Nurse Tekla doing her rounds, but Nurse Tekla died sixty years ago. Irene Huss has the challenge of disentangling wandering ghosts and complex human relationships to get to the bottom of this intriguing case.