This is an Inspector Sejer book, originally published in 1995, translated into English last year. That makes it the very first Inspector Sejer book. Translated at last. Sigh.
From the Blurb:
Eva is walking by the river one afternoon when a body floats to the surface of the icy water. She tells her daughter to wait patiently while she calls the police, but when she reaches the phone box Eva dials another number altogether.