Secrets of Dr. Taverner-Dion Fortune

This is the first volume of Dumas' Marie Antoinette Romances (also called "The Memoirs of a Physician"). This historical fiction chronicles the strange events surrounding the fall of the French monarchy (starting ~1770) and rise of revolutionaries so terrifying that the period is still called "The Reign of Terrors" (1793-1794). In this volume, a renowned magician, Count Alessandro di Cagliostro (Balsamo), employs various occult tactics, like hypnotism and necromancy, to gain state secrets. Balsamo claims to be plotting against the Bourbons, but one must wonder whether this 3000 year old sorcerer has an ulterior motive... - Summary by jvanstan