This is a personal project by @dellsystem. I built this to help me retain information from the books I'm reading.
Source code on GitHub (MIT license).
Piketty, T. (2016). On Oligarchy in America. In Piketty, T. Why Save the Bankers?: And Other Essays on Our Economic and Political Crisis. Houghton Mifflin Harcourt, pp. 237-242