The textbook they wrote together was while both were collaborating at PARC (Mead was at CalTech, then, too); they wrote it to add credibility to their VLSI theories, which at the time most experts believed would lead to thermal runaway (i.e. not stable, long-term, to pack transistors densely).
https://en.wikipedia.org/wiki/Carver_Mead
Learning about the interconnectedness of all this historic intellectual "brain theft," keeps me excited for an AGI-future, post-copyright/IP. What are we going to accomplish [globally] when you can't just own brilliant ideas?!