1. Do we need to rethink EU politics in the social media era? An introduction to the volume; Mauro Barisione and Asimina Michailidou.- 2. Social Media, Personalisation of News Reporting, and Media Systems' Polarisation in Europe; Pablo Barberá, Cristian Vaccari and Augusto Valeriani.- 3. Engaging with European Politics through Twitter and Facebook: Participation beyond the National?; Michael Bossetta, Anamaria Dutceac Segesten and Hans-Jörg Trenz.- 4. A digital movement of opinion? Contesting austerity through social media; Mauro Barisione and Andrea Ceron.- 5. Building Contention Word-by-Word: Social Media Usage in the European Stop ACTA Movement; Dan Mercea.- 6. Campaigning for gender equality through social media: the European Women's Lobby; Helena Seibicke.- 7. A framework for evaluating European social media publics: The case of the European Parliament's Facebook page; Ancuța-Gabriela Tarța.- 8. Extreme Right, the Internet and European Politics in CEE countries: the cases of Slovakia and the Czech Republic; Manuela Caiani and Alena Kluknavská.- 9. Social media as propaganda tools: the Greek conservative party and national elections; Yiannis Mylonas.- 10. Mediated Frustration and Self-legitimation; Terje Rasmussen.- 11. Twitter, public engagement and the Eurocrisis: More than an echo chamber?; Asimina Michailidou.- 12. Debating Responsibility on the Eurozone Crisis in Traditional Media Newspaper Reporting in Greece and Germany under a Social Media Lens; Jochen Roose, Moritz Sommer, Franziska Scholl, Maria Kousis, Kostas Kanellopoulos and Angelos Loukakis.