yeah, they go into that in the referred-to book (The Personal Computer from the Inside Out).. though spectacularly irrelevant in this day and age, it still makes a thrilling read, for me anyway ;)
It does me too... I was an early high school computer enthusiast/programmer around this time, and remember waiting for Windows 3 with bated breath. At the time, I didn't appreciate the engineering and politics behind what went into Windows 3, and it's fun to look back on it all in retrospect.
I never liked the product as much, but the same thing's true for me for Windows 95. I remember waiting years for it, and then all the drama around Schulman's work to try to uncover _undocumented_ API's that Microsoft was reserving for itself to give its software an advantage. The AARD code is about all I remember of that that was real. (And of course now, Apple has undocumented API's all over its products, and it doesn't get nearly the press that that did then.)