Interested in what sort of volumes eBooks make?

Head on over to AOER. Inspired by Emily Veinglory's graphs, I plotted out (okay, hit the graph button in google spreadsheets) a nice little graph that showed a group of sales data from a number of AOER authors.

I made some quasi-uneducated hypotheses from the data. I'm no statistician so take it all with a grain of salt.