Pardon the title but being a fan of visual representation of quantitative data, and of Edward Tufte, I really, really liked The Ebb and Flow of Movies: Box Office Receipts, 1986-2008 by Mathew Bloch, Lee Byron, Shan Carter and Amanda Cox. Great stuff. Us historians need to learn from these guys ways of presenting historical data/information in graphical format. Think, for example, the 1100 – 1800 period in India with many competing claimants to power and a similar ebb and flow of dynastic succession.
And specifically on the map, look how long the tail used to be.