If you haven't already, you should read John Romero's autobiography "Doom Guy: Life in First Person". There are some details from "Masters of Doom" that Romero disputes.

It's been on my list, but I haven't read it yet.

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.

[1] https://sharewareheroes.com/