Larry Lessig's book, Free Culture, was the inspiration for the Free Culture movement, released as a paperback as well as a free online book, using the license CC-BY-NC 1.0 ( creativecommons.org/licenses/by-nc/1.0).
How ironic that Students for Free Culture consider the Noncommercial license to be "proprietary" and incompatible with free culture? http://freeculture.org/blog/2012/08/27/stop-the-inclusion-of-proprietary-licenses-in-creative-commons-4-0/
I wonder how many of them read the free online version - noncommercial license and all?
Thanks very much to Creative Commons for keeping up the fight for free culture; note that after fulsome discussion, CC has elected to retain the noncommercial license in version 4.0, with no change in definition.