He is the author of Blogs, Wikipedia, Second Life and Beyond: From Production to Produsage (2008) and Gatewatching: Collaborative Online News Production (2005), and a co-editor of A Companion to New Media Dynamics (2012, with John Hartley and Jean Burgess) and Uses of Blogs (2006, with Joanne Jacobs). Bruns is an expert on the impact of user-led content creation, or produsage, and his current work focusses on the study of user participation in social media spaces such as Twitter, especially in the context of acute events. His research blog is at http://snurb.info/, and he tweets at @snurb_dot_info. See http://mappingonlinepublics.net/ for more details on his current social media research.