The author calls them the "Lennon and McCartney of video games." Masters of Doom is about John Carmack and John Romero, the founders of id Software.
If their names, or the names of the company, don't ring a bell for you, it means you are probably not a gamer, or more specifically, a fan of the first-person shoot-em-up games they pioneered, Return to Castle Wolfenstein, Doom, and Quake.
Author David Kushner quickly takes us through the troubled adolescence of the two Johns, both products of broken homes who were enthralled by computers and computer games. The two met when they both went to work for the shareware publishing company SoftDisk, in Shreveport, Louisiana, but their talents soon outgrew that company. The strengths of their talents meshed together ideally. Carmack was the technical wiz who was able to create the software engine that enabled the scrolling movement, and later the 3-D effects that powered their games. Romero was the creative designer who came up with the ideas.
The book is going to interest many people. (Whether they will tear themselves away from their games to read it is another question.) As far as I know, it is the only history of the computer gaming industry, going back to the Pong era, the shareware era of the Apple II and Atari, buying games in ziplock bags, or downloading them from electronic BBSes. While the story focuses on the fast-twitch action games of id, you also see the other big names of gaming in passing, such as Will Wright of Sim City fame, or Sid Meier of Civilization.
People looking at the history of the PC may also like it. It's interesting for the way it recalls the huge jumps in technology, such as when you could get a computer that could display 16 colors, or 256! Or the excitement the two Johns show when they get their "state of the art" 386 computers.