Depends on what you mean by independently wealthy. Programming Languages: Application and Interpretation is freely available from the Shriram Krishnamurthi. (h

Depends on what you mean by independently wealthy. Programming Languages: Application and Interpretation is freely available from the Shriram Krishnamurthi. (http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/ http://www.cs.brown.edu/~sk/Publications/Books/ProgLangs/). I can vouch for Shriram being one of the most passionate educators I've ever had the pleasure to study under. Nevertheless, as a university professor I don't imagine that he's Warren Buffett rich. Likewise, Professor Geoffrey Grimmett distributes 'Probability on Graphs' on his website (http://www.statslab.cam.ac.uk/~grg/books/pgs.html http://www.statslab.cam.ac.uk/~grg/books/pgs.html) The PDF version is actually better than my print copy, which contains an incoherent index.