Knock Knock

In Roslund’s heart-pounding fourth Grens and Hoffman novel (after 2019’s Three Hours with the late Börge Hellström), a break-in at the Stockholm apartment where every member of the Lilaj family, except five-year-old Zana, was killed 17 years earlier prompts Det. Supt. Ewert Grens to reexamine the case. Grens discovers that Zana’s witness protection file has disappeared from a secure police archive just as several criminals are murdered in the same manner as her family. Meanwhile, Piet Hoffman is contacted anonymously by a person who knows all about Hoffman’s time infiltrating Stockholm’s criminal underworld for the police. If Hoffman doesn’t start a gang war and thereby kick start demand for this new player in the weapons smuggling business, he and his family will be killed. Grens and Hoffman combine forces, as Grens senses they’re working two ends of the same problem. While the peril that Hoffman faces is palpable, Grens’s impending retirement and loss of purpose presents its own existential threat. This terrific mash-up of police procedural and crime thriller has strongly imagined characters, explosive action, and a twisty plot with an unexpected conclusion. It’s a must for Scandinavian noir fans. Agent: Niclas Salomonsson, Salomonsson Agency (Sweden). (Jan.)