My academic book about the Forge, Tabletop RPG Design in Theory and Practice at the Forge, 2001-2012: Designs and Discussions is available from Palgrave Macmillan. It combines a historical account of the forums with a recapitulation of the “Big Model” and some examination of the communication dynamics in the threads. It’s written to be accessible to a non-scholarly (read: gamer) audience, and the concluding chapter is presented as an RPG about being a participant in the “indie scene” of the 00s.
I’m three chapters in and really enjoying it. I was never part of the Forge, only heard about it in retrospect. I was gaming but not online or anything. Very cool to see the lines of development presented in this well written book.