Maya is a very sophisticated, very capable and very expensive 3D modeling program. (Students, however, don't have to pay several thousand dollars for Maya - they can get it free.) Unity is a game engine, with a free version, that makes it possible to script the art and assets you provide and make them come alive.
Neither program is simple. Both applications have very steep learning curves. And, finally, both programs expect that the user will have not only artistic talent, but an intellect that comprehends the mechanics of gaming in order to create something that is both interesting and playable.
The book is clearly intended to be a text, whether for classroom or self-learning, and it is a fine tool for the task.
Profusely illustrated and written in a clear style, this is first and foremost a book on Maya techniques. If you haven't mastered Maya, the Unity section may be of little use, though Unity can be used with the output of many other 3D programs.
Unity is essentially a scripting program and much easier to use than attempting the same tasks, for instance with C#.
The Unity section of the text is also well illustrated and clearly written.
Could someone learn how to use Maya and Unity from this book and its companion website? I think so. But if you lack artistic talent and training, it may not get you anywhere.
Jerry