This work fits in nicely with recent studies of language on-line, digital literacy, language use in social media, and digital discourse. The book presents an excellent case for using the Appraisal Framework to analyze interaction in social media ... I see a lot of potential for future research analyzing hashtags used on and off line, in fact reading this book has led me to conduct some of my own research on hashtags. Zappavigna's discussion of hashtags as a form of meta-discourse that goes beyond known meanings of metadiscourse, I found particularly inspiring.

LINGUIST List

A rigorous and technical framework for understanding the social meaning of one of the most iconic linguistic forms of digital communication: the hashtag ... Readers who are tired of the popular trope about how social media is impoverishing our communication will be thrilled by Searchable Talk's meticulous and in-depth linguistic analysis of all the shades of social meaning that hashtags add to our digital communication.

Babel: The Language Magazine

A valuable and useful account ... Not only does this monograph flesh out Zappavigna's SFL-based approach to the examination of social media communication, it provides the most comprehensive account of hashtags from a social semiotic/SFL perspective that I am aware of, and will be of interest to researchers and research students alike.

Discourse & Communication

Zappavigna's monograph is one that should be read from cover to cover. This is an informative and inspiring book that is bound to invite new research not only on hashtags but also on communication on social media taken as a whole. #MustRead for all linguists interested in social media communication.

Journal of Pragmatics

What if the pundits are right? What if the development of the social web is as significant a development in the evolution of our species as the invention of writing? Readers interested in this issue need look no further than Zappavigna's enthralling explorations of social networking – and her account here of the enabling role played by hashtags as ever-more users embark on ever-more search and deploy missions in order to commune. Ambient affiliation has changed the fabric of our social world. Zappavigna shows us how.

J R Martin, Professor of Linguistics, University of Sydney, Australia

Searchable Talk makes an impressive contribution to the rapidly growing literature on internet communication. Zappavigna writes with equal clarity about the technological and the semiotic aspects of hashtags, and about their role in categorizing information and their role in creating communities of like-minded internet users. As if that is not enough, the focus on Trump hashtags provides a valuable critical edge.

Theo van Leeuwen. Professor of Language and Communication, University of Southern Denmark and Emeritus Professor, University of Technology, Sydney, Australia