Dear friends, colleagues, and comrades,
The book is Progressive Library Organizations: A Worldwide History (McGarland, 2015). The first update was also published in the Journal of Radical Librarianship, vol. 4 (2018). It covered the years 2013-2017. This update is for 2018-2023.
It of course covers SRRT and PLG, and it also has extensive coverage of the Swedish organization (BiS), and concluding coverage for the German and Austrian groups. The BiS coverage is based on interviews I did in Sweden last summer and extensive review of documents (using Google Translate).