
I can strongly recommend Richard Moss' Shareware Heroes book for those interested in remedial reading, and not just for those devoted to games.
If there are any computer history grad students lurking, an integrative history of early software distribution models and industry orgs is still a big, gaping hole in the lit, as far as I know.
I also found that Shareware Heroes by Richard Moss was a good, if more general, accompaniment.
I also stalked Scott Miller from Apogee Software to ask him how accurate Masters of Doom was, and he told me to checkout the book "Shareware Heroes", as he claims it's more accurate [1]. I still haven't read it but that's the next thing I plan on reading.