Anyone interested in how progressives are using the Internet as a vehicle for political and social action should pick up Jessica Clark and Tracy Van Slyke’s accessible, provocative book, Beyond the Echo Chamber: Reshaping Politics Through Networked Progressive Media (The New Press, 2010). Their micro-analysis of networked progressive activism forms a topographical map of the loosely affiliated groups and individuals who have emerged as a movement in a rapidly changing media environment. Using this map, readers can sort their way through the thicket of interrelated legacy publications, websites, blogs and social networking sites that constitute the hubs and highways of the progressive movement and understand how progressives have been using new media to push back against the political status quo. Especially for those who are engaged in the process, having the opportunity to understand how their efforts are reinforced and influenced by the contributions of those in other portions of the far-flung blogosphere gives purpose and definition to the broader workings of an often ill-defined entity.