THE WORLD OF ONLINE NETWORKING AND COMMUNICATION HAS EXPLODED in the last ten years. Social networking sites, YouTube, and blogs offer hours of entertainment, but have also become important vehicles for activism. The "netroots," as Eric Boehlert calls this phenomenon, have risen to incredible power, and never has that been clearer than in the 2008 presidential election.

Bloggers on the Bus traces the major events that rocked the campaign trail and reveals the stories of the online activists who made it all possible. In the tradition of Timothy Crouse's essential...