The Queen of Diamonds by Jean Plaidy
Set in 18th Century Paris, The Queen of Diamonds is the sensational story of the Diamond Necklace scandal, a historical mystery said to have brought down the French monarchy.
The world shook at the eruption of the French Revolution, a revolution, some say, precipitated by a single factor: the theft of the Diamond Necklace, apparently commissioned for Marie Antoinette, which helped to bring both her and King Louis XVI to the guillotine. But behind it was woven a complex and daring conspiracy, involving a Prince of the Royal House of France, the charming and duplicitous countess Jeanne de Valois, and the infamous Comte de Cagliostro - all pawns in a secret, devious plot for wealth and supremacy in France.
Full of romance and intrigue, The Queen of Diamonds brings alive the explosive atmosphere of revolutionary France.