Straight into Darkness by Faye Kellerman

AS A CITY TURNS AGAINST ITSELF, A KILLER LIES IN WAIT...

In the late 1920s, Germany is a country torn apart by dissension. Sparring political groups threaten chaos in Munich, where Adolph Hitler's National Socialist Democratic Workers Party gains strength by the day. Nazis are creeping into positions of authority all over the city - including the police department.

Inspektor Axel Berg of the newly formed Mordkommission considers himself a progressive, having experienced the horrors of the Great War and finding a distinct lack of valour and nobility in death. When he's called to investigate the grisly murder of a young society wife, he is thrown into a web of dangerous intrigue. Suddenly, senior colleagues have an unprecedented interest in his work, and there are rumours that the death is linked to a political conspiracy.

When two more corpses are discovered, the city is thrown into confusion and panic. Berg questions whether he's searching for a lone lunatic or a calculating assassin with a more sinister agenda. With few to trust even among his closest colleagues, Berg has to judge who's more dangerous: the killer who hunts in the darkness, or the faceless enemy that could be anyone.