Kevin Carson is working on a fourth book!  What he stresses is a very rough draft is available online here; it looks fascinating, as usual.  
 Its topic is the potential for networked organization to constrain the exercise of power by large, hierarchical institutions in a way that once required the countervailing power of other large, hierarchical institutions.
(I guess releasing ongoing drafts of a work on open source is a way of achieving unity of medium and message.)
