Quake 4 Mods for Dummies [With CDROM]

While this book does primarily cover mapping for Quake 4 (which is a form of modding), it also covers other aspects of modding (although in lesser detail). However, if you want to make a new level for the game, this book rocks. It comes with complete examples on making maps from start to finish. It shows you how to make custom textures for your maps and characters. Then it shows you how to package and release your map to the world. [...] Definitely worth the price. You'll be making your own maps for your friends or clan by the end of the weekend.