Much of the book concentrates on this dynamic. While the two men initially complement each other well, eventually conflicts develop, leading Romero to be fired from the company. Carmack, the skilled creator of the complicated and fast game engines the company's products use, is repeatedly referred to as the only person in the company who isn't expendable, and this gives him a great degree of authority and influence. However, this influence transforms id Software into a considerably less pleasant and fun place to work and causes the company's games to become increasingly repetitive, despite their technological sophistication. Romero is on the opposite end of the spectrum; his Ion Storm is intended to be a very fun place to work, where " design is law" (Ion Storm's slogan was "Design is Law") and that technology must be created to realize the designer's vision, instead of the other way around. However, his lack of management and organizational focus leads to poor and financially disastrous results.