E. Phillips Oppenheim 
Murder at Monte Carlo [EPUB ebook] 

Roger Sloane is a young American living on the Cote d’Azur during the late 1920’s. He meets an old classmate who is wandering Europe after inheriting a title in England. Together the two friends, along with a disparate group of upper class diletantes combat the sinister forces of a gang of American bootleggers who have abandoned New York and set up a sophisticated crime syndicate in the South of France. Robbery, murder, secret hideouts, fast cars, and beautiful women all figure in this tale of roaring 20’s. Roger meets a wild and beautiful child of the hills, Jeannine, who reappears as the protege of his Aunt, and the belle of the casino.