Social Media and Everyday Politics is available to borrow from more than 340 libraries in 30 countries around the world. You can search for listings in Worldcat. If your library does not have it, request a copy through their own website or order a copy from the publisher (see below).
The book is available as paperback, hardback, and ebook, and you can order it from your local bookstore (they’ll usually have to order it in these days, but most catalogues will be able to source it), or direct from the publisher: Polity (or Wiley) (especially for institutional orders, e.g. for libraries or exam copies).