Jenna Burrell is an associate professor in UC Berkeley's School of Information. Her book Invisible Users: Youth in the Internet Cafes of Urban Ghana was recently published by MIT Press. She completed her PhD in sociology in 2007 at the London School of Economics, carrying out thesis research on Internet cafe use in Accra, Ghana. Before pursuing her doctorate she was an application-concept developer in the People and Practices Research Group at Intel Corporation Burrell's research interests include theories of materiality, user agency, transnationalism, post-colonial relations, digital representation and especially the appropriation of information and communication technologies by individuals and social groups on the African continent.