This book begins with a good grounding on the mathematics of 3d models and covers all the main concepts of matrices and vector transformations. It also covers many of the most popular 3d model file formats, although there isn't any mention of the popular .x format. My main gripe with focus on 3d models is the lack of practical examples, yes it has demonstrations and the code for getting your models into the directx framework. But that's as far as it goes. It doesn't show you how they could be practically used in a game environment, neither does it go into detail with skeletal meshes. If you want characters with skeletons walking or animated in your game, don't look here. It's also much shorter than the other books in the series at just 200 pages. My final point; it's a nice book, it just lacks detail and follow through.