Dead of Night: Simon Scarrow

Germany has conquered Poland. The world is praying for peace. At home, the Party's hold on power is absolute.
One freezing night, an doctor and his wife cheerfully return home from an evening out. By sunrise, the doctor will be lifeless in a pool of blood.
There is pressure to record the incident as a suicide, but the first evidence uncovered by Criminal Inspector Horst Schenke points to a chillingly staged murder. The investigation is swiftly blocked by Schenke's superiors, but he can't let it go. When he uncovers links to the mysterious death of a child, a terrifying secret begins to emerge.
In times of war, under a ruthless regime, there are places no man should ever enter. And Schenke fears he may not return alive . . .