Checkmate to Murder. A Second World War Mystery, Paperback/E.C.R. Lorac

On a foggy night in London, a party has gathered in an artist's studio during the wartime blackout. When the brutal murder of the miser next door is discovered by his infantryman nephew, it's not long before Inspector Macdonald of Scotland Yard is at the scene, untangling alibis from the studio party and with the fate of the soldier in his hands.