Book excerpt: This book deals with participation frameworks in modern social and public media. It brings together several cutting-edge research studies that offer exciting new insights into the nature and formats of interpersonal communication in diverse technology-mediated contexts. Some papers introduce new theoretical extensions to participation formats, while others present case studies in various discourse domains spanning public and private genres. Adopting the perspective of the pragmatics of interaction, these contributions discuss data ranging from public, mass-mediated and quasi-authentic texts, fully staged and scripted textual productions, to authentic, non-scripted private messages and comments, both of a permanent and ephemeral nature. The analyses include news interviews, online sports reporting, sitcoms, comedy shows, stand-up comedies, drama series, institutional and personal blogs, tweets, follow-up YouTube video commentaries, and Facebook status updates. All the authors emphasize the role of context and pay attention to how meaning is constructed by participants in interactions in increasingly complex participation frameworks existing in traditional as well as novel technologically mediated interactions.