Showing A Man Without Breath by Philip Kerr

It is winter, 1943. Bernie Gunther has left the Criminal Police and is working for the German War Crimes Bureau based in Berlin.

Reports have been circulating of a mass grave hidden in a wood near Smolensk. The grave's whereabouts are uncertain until, deep in the Katyn Forest, a wolf digs up some human remains. Rumour has it that the grave is full of Polish officers murdered by the Russians - a war crime that is perfect propaganda for Germany.

But it needs a detective of subtle skill to investigate this horrific discovery.

Cue Bernie Gunther...