A download for David Kushner’s (often sought as a .zip or ebook) typically contains the 2003 non-fiction book chronicling the rise of id Software and its co-founders, John Carmack and John Romero . Summary of Masters of Doom

While "zip" files are often found on pirate sites, legitimate digital copies and previews are available through various platforms:

: Updates on David Kushner’s work can be found on his Official Website.

: The narrative highlights the diverging philosophies between Carmack (the disciplined technical genius) and Romero (the flamboyant rockstar designer), which eventually led to a bitter split and the collapse of Romero's subsequent studio, Ion Storm .