Never mind The Age of Light, I'm going to pick Who Spoke Last? by J.V. Turner for my current BL-Opoly square.
J.V. Turner wrote Below the Clock, which I enjoyed immensely, and this book seems to be in the same vein, except set among the stock-brokers in the City rather than the politicians of Westminster.
Oh, and the "image of any European city or monument on the cover" as required by the BL-Opoly task should be met with this book, too, as the edition I have has a picture St. Paul's Cathedral on it.