Third time's a winner!!
I greatly enjoyed the other two Natasha Leister books I read, but this third one is my absolute favourite!
The Riviera House, like the other two I read, take place during World War II in Paris. The focus of this one is the art. In WWII, Hitler and his minions made a very deliberate and consolidated effort to steal and also destroy much of France's art treasures. The Louvre was one of the buildings taken over, and it was there that art was either collected and shipped off to Hitler and Goering, or it was deemed sinful and burned.
Leister did such an amazing job of describing much of this process, and the anguish the local curators felt as they were helpless to stop the process. There was also a very concentrated effort by subversive factions to document which art went where, so that they could hopefully try to retrieve it, should the Allies win.
I would wholeheartedly recommend this one to anyone who has a curiosity about this time period.