Laurence Lessig has written a book that ought to make both lawyers and cyberspace specialists think. Contrary to expectations (from a lawyer), Lessig demonstrates excellent skills in the technicalities of cyberspace, and his analysis has interesting bearings on political philosophy and legal philosophy. To the traditional question, 'what is law?', Lessig adds a new (and admittedly controversial) dimention: architecture is part of law. Creating a specific architecture amounts to legislating. The controversial aspect here is whether law can include norms which cannot be disobeyed. Lessig applies this idea to the foundation and continuing transformation of cyberspace. Created by the academic world, the architecture of cyberspace has reflected liberal values. However, it is being conquered by commerce, and this reflects far less liberal regulation. State intervention is usually viewed as restrictive, but Lessig's description raises the question: should, and can, the state intervene to maintain the values of the founding fathers of cyberspace? The law of cyberspace is thus skillfuly analysed in the broader contexts of constitutional law and legal philosophy. If you are on the lookout for fresh vantage points on these fields of inquiry, read Lessig's book.