New media are everywhere, yet with so many technological developments and theoretical perspectives understanding them has never been more difficult. This textbook explains the key concepts and approaches to the impact of new media on the economy, society, identity, politics, friendship, citizenship and everyday life. Putting the student first, this book: * engages the reader with integrated, up-to-date case studies * brings it all together with chapter summary charts * challenges students to apply concepts with e-tivities * provides key further online readings at www.sagepub.co.uk/siapera This is both starting point and map for any student of new media.