The Tiger in the Smoke by Margery Allingham
The Tiger in the Smoke is an intelligent crime novel set just a few years after World War II. It's a tough time in London. Many people are quite poor and many ex-servicemen are having a difficult time. London is also being plagued by a pea-soup fog, which lends a darkness and opaqueness to many scenes in the story. The story starts with Meg, who is soon to be married, has been receiving photos showing, in theory, her husband, who was presumed killed in the war, walking around modern-day London. She calls on Campion to help her. At first, the mystery seems to be who is planning on blackmailing her, but soon it becomes more of a thriller than a mystery. We know who the bad guy is: Havoc, an escaped convict, a psychopath. The man sending Meg the photos had been one of his lackeys. Now, it becomes a race for the detectives to catch him before there are...