The example of maps he shows here discusses a social interaction component which allows for an interdisciplinary approach to the knowledge scaffolding (especially if students shared their work with each other).

Are there other non-social affordances in this system? Affordances that would let an individual go further/faster by themselves?

Is the cohesive nature of Hutchins and Adler's enterprise for the humanities and the Great Conversation, part of the kernel of the rise of interdisciplinarity seen in the early 2000s onward in academia (and possibly industry).

Certainly large portions are the result of uber-specialization, particularly in spaces which have concatenated and have allowed people to specialize in multiple areas to create new combinatorial creative possibilities.

DeRosa, Robin. Interdisciplinary Studies: A Connected Learning Approach. Rebus Communities, 2016. https://press.rebus.community/idsconnect/.

found via <br /> Sheridan, Victoria. “A Pedagogical Endeavor.” Inside Higher Ed, August 9, 2017. https://www.insidehighered.com/digital-learning/article/2017/08/09/robin-derosas-oer-pedagogical-endeavor.

On first blush it looks like I've read portions of some of these chapters as blogposts on the authors' original websites. Should be interesting to see how those are linked/credited.

Given the writing contained in the book it would be interesting to see Pressbooks and/or the Rebus Community allow support for having the lead of a project be credited as an "editor" on the front page rather than to default them as an "author".