Lessig's "Code and Other Laws of Cyberspace" was published in 1999. The book quickly began to define a certain vocabulary for thinking about the regulation of cyberspace. More than any other social space, cyberspace would be controlled or not depending upon the architecture, or "code," of that space. And that meant regulators, and those seeking to protect cyberspace from at least some forms of regulation, needed to focus not just upon the work of legislators, but also the work of technologists.
Code v2 updates the original work. It is not, as Lessig writes in the preface, a "new work." Written in part collectively, through a Wiki hosted by JotSpot, the aim of the update was to recast the argument in the current context, and to clarify the argument where necessary.