I wasn't overly impressed by the first chapter or two. However, as the book progressed, I began to appreciate it more. In particular, the chapter on the cult of Leonardo and how hiw reputation and image evolved over time were thought provoking. It's easy to forget, even as a historian, how much we shape history to fit ourselves and what we're seeking. The chapters about the evolution of the interpretation of and attitudes toward the Mona Lisa itself were also interesting, although some of his claims and connections seem far-fetched. His work was so broad that it wasn't always deep, and some of his conjectures seem weak. However, overall it was a thought-provoking book and worth teh time to read it.