Comment Some National Academy Books also free (Score 3, Informative) 95
If you go to the National Academy Press web site, http://www.nap.edu/about.html, you will find that many of their books are available in PDF format, and that many of those can be downloaded for free. To find what you are interested in, use the search box in the upper left hand side of their about page. Since we taxpayers paid for most, if not all, of the work being presented, perhaps they all should be free.
