Janice Law 
Prisoner of the Riviera [PDF ebook] 

In postwar France, a gambler finds that surviving his vacation may be a long shot Peace has come to England and the blackout is over, but the gloom has yet to lift from London. One night, leaving a gambling club where he has run up a considerable tab, the young painter Francis Bacon, accompanied by his lover, sees a man gunned down in the street. They do what they can to stanch the flow of blood, but the Frenchman dies in the hospital. Soon afterward, Bacon receives a strange offer from the club owner: He will erase Bacon’s debts if the painter delivers a package to the dead man’s widow, Madame Renard, on the Riviera. What gambler could resist a trip to Monte Carlo?After handing over the parcel, Bacon learns that Madame Renard is deadand the striking young woman who accepted the delivery is an imposter. The Riviera may be lovely, but in 1945, its sun-drenched beaches can be just as dark as the back alleys of London.