This is a book of two halves - game programming and game design. At the heart of it is the new Director 3D programming engine, which is a major new addition to the capabilities of the software. Allen Partridge's book is aimed principally at those who are familiar with Director and comfortable with lingo, but may be new to 3D as a whole. The first half of the book goes through the capabilities of the 3d engine in detail, including shaders, lights, textures, physics and vector maths, as well as some insights into using 3D modelling software to its best advantage. The second half looks at the process of creating an actual game, and one of its most valuable features is that the accompanying CD includes the game at many stages of the design process.
If you're looking purely for 'how to program in 3d', you may find that half the book is not what you're looking for: much of it is given over to game storyboarding, character design, marketing etc. But if you're looking for an all-round approach to game design, then this is a great introduction and inspiration.