The topic about the CRPG book reminded me of this one (mostly of interest for fellow Germans):
It’s (obviously) about the history Pen & Paper RPGs (which normally interest me only in so far as they inspire many of the cRPGs I like), but the book was really a fun and informative read.
There’s also an accompanying volume, called “The Interviews” that contain exactly that, the various interviews the authors conducted with various figures of the RPG scene (most of those in English).