"The next chapters look at the enemies, levels and weapons in Doom 3 in detail with comments from the animators, level design, and art teams from the game accompanied by artwork and detailed screenshots from the game itself. The final two portions of the book concentrate on the games engine, with the first part being a detailed interview with id’s John Carmack as he goes in heavy technical detail on the game’s graphics (there is even a glossary at the end of the interview with definitions of some of the terms used by Carmack for the less technically inclined reader). The second part of the Doom 3 engine portion of the book looks at other technical aspects of the game, from the GUI interface design to sound and AI development to creating scripted sequences of the game."