Moray Dalton's Golden Age murder mystery covers all the bases with aplomb. A murder is committed in a country mansion on a dark night (the victim is even in 1930s style fancy dress) and there are an assembled collection of suspects which the police and a private detective begin to investigate...
Although the crime and investigation covers little new ground what makes the story stand out is the romantic angle which becomes a major plot point, such things often missing or handled clumsily in Golden Age mysteries.
A well written and enjoyable little mystery.