Murder in Monaco. The Maggie Newberry Mysteries, #22

Where's there's glitz and money.there's a knife poised for every backThe Côte d'Azur is the timeless epitome of beauty, from its lush green hills to its azure waters and white sandy beaches. And Monaco has always been the jewel right in the center of the Riviera, a sparkling example of incomparable wealth and beauty. But when Laurent and Grace disappear on an antique buying trip to Monaco that should only take a few hours, the police suggest they ran off together.
With only a contrary off-duty detective from Aix who never liked her, Maggie will plumb the underbelly of Monaco's gambling dens to find her loved ones before they disappear forever.