Together with our partners of the Access to Knowledge Global Academy, A2K4D and the Yale ISP are co-editing a book project analyzing mobile telephony within the Access to Knowledge framework. In recent years, the rapid and worldwide spread of mobile technologies has greatly expanded access to basic telephony and a wide range of Internet-based services. The book looks at opportunities and challenges that arise from this development, especially in terms of access and control. The focus on mobile telephony allows the different chapters to analyze a complex network of actors and their relationships with states, private companies, and citizens. Mobile phones or mobile technologies are the sites of investigation for current struggles over access to information, surveillance, control, subversion, privacy etc. and it explores mobile telephony as the source of opportunities and challenges, especially with respect to access and control. The book is edited collaboratively by Ramesh Subramanian, A2K Fellow at the Information Society Project at Yale University, and Stefanie Felsberger, Senior Researcher at A2K4D and brings together scholars, activists, and other subject-matter experts from across the globe.