London Particular is a 1952 mystery crime novel by the British writer Christianna Brand.

It was published in the United States in 1953 under the alternative title of Fog of Doubt.

During a dense London fog, a Belgian man Raoul Vernet has his head staved in while on his way to visit Doctor Evans and his family.

Due to the poor visibility it is unclear who has committed the murder, although several have motives.

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