For anyone interested in this author’s book on Tor, it’s available for free download! https://direct.mit.edu/books/oa-monograph/5761/TorFrom-the-D... (full disclosure: i work for MIT Press)
Plus I learned a lot -- it came out of some academic research that pursued a unique angle: finding and talking to the Tor exit node operators about their experiences, rather than just say the developers, the executives, or the funders.