David Bodanis - Passionate Minds - The Great Enlightenment Love Affair (Little, Brown, 2006)

One more biography on the life that Voltaire and Emilie du Châtelet had together at the castle of Cirey. Bodanis is more interested in the story of the two figureheads of the French enlightenment than he is in their thoughts and new insights.

Nevertheless, it's insightful, interesting and funny at times, and for a biography, also easy to read. With two characters such as Voltaire and Emilie, not much can go wrong in the description of their lives. They did so much and meant so much for later generations that is almost seems like a feat to describe their lives in 230 pages.