Original title: Suljettu kansio
Author: Tuomas Niskakangas
Published: 2026
Publisher: WSOY
Genre: Crime & Suspense
Part of a series: Department K
Reading material:
Finnish Edition
English sample + full English draft translation
English synopsis
The start of a gripping new thriller series! The Department K series blends a web of power games and criminal investigations with finely crafted psychological portraits.
When journalist Joel Saarni’s affair with his editor-in-chief makes the tabloid front page, he’s forced to leave his job. But the unfinished story won’t let him go. Someone has sent him a folder containing highly incriminating material: a Finnish network equipment company appears to have made illegal deals in Russia. But why?
Corporate lawyer Petra Thorry has her own reasons for getting involved. She’s obsessed with solving the mystery of a child who vanished in the 1990s.
As the investigation deepens, Petra and Joel are drawn into a tightening web of lies and espionage—where the deadly strings are pulled by Department K.
The Sealed Case launches a new top-tier Finnish thriller series. Department K is an addictive story about unchecked power—and the people who can no longer look away.
Loukko by 


