I love a good historical mystery, especially if the author has successfully recreated the era in which the story takes place. The Black Tower by Louis Bayard is just such a book . Dr. Hector Carpentier is drawn into a web of intrigue when his address is found on a note in the pocket of a murder victim. Carpentier doesn’t know Henri LeClerc—yet. But when Paris detective Vidocq shows up at his door, he is about to find out who the deceased is. Vidocq is the master of disguise, and he needs every one if he is to find out if Louis Charles, the son of Louis XVI and Marie Antoinette, survived the abuse and neglect of his guards in the Temple’s Black Tower during the French Revolution. Because if he did, he is France's rightful king.