It's hard to imagine an artist more thoroughly out of fashion than the great 17th century Flemish master Peter Paul Rubens. His paintings' classical references, overheated religious drama, and High Baroque style are often lost on today's viewers. A contemporary woman described as "Rubenesque" would probably be reduced to tears. But now Mark Lamster has written the compelling "Master of Shadows: The Secret Diplomatic Career of the Painter Peter Paul Rubens" which manages to be engaging, instructive and thought-provoking, all at once...