Season of Darkness (Detective Inspector Tom Tyler Mystery)

In 1940, England is desperate and fearful. The threat of a German invasion is real, and many German Nationals are interned in camps across the country. When a young woman is found murdered on a desolate country road, Tom Tyler, a detective inspector, finds himself drawn into an uneasy alliance with one of the Prees Heath internees, a psychiatrist, who is an expert on the criminal mind.