The Winter Garden

Clara Vine is an actress at the famous Ufa studios by day and an undercover British Intelligence agent by night. When a young girl is found brutally murdered in the gardens of Berlin's notorious bride school, where young women are schooled in the art of being an SS officer's wife, Clara soon discovers that the murder is linked to a far more ominous secret. With the newly abdicated Edward VIII set to arrive in Berlin, and the Mitford sisters dazzling on the social scene, Clara must work in the darkness to find the truth. It is a dangerous path she treads, and it will take everything she has to survive...
The Winter Garden by Jane Thynne