While the games themselves are discussed in detail, Kushner's main focus is in the work dynamic and personalities that enabled their creation. He describes Carmack and Romero as the driving forces of id Software, but with very different personalities: Romero is presented as having unbridled creativity and considerable skill, but he loses focus when the spectacular success of the games allows him to adopt a rock star-like public persona. Carmack, on the other hand, is depicted as an introvert, whose unparalleled programming skills are the backbone of id Software, enabling the company to create extremely sophisticated games. However, he has little interest in – or even understanding of – the social niceties that enable people to enjoy working together.