You can actually find a number of the chapters for free at the book's website.
Java 3D was a neat API, but has since been "put on hold" in January 2008. It's not looking good, 3 years later and with no apparent progress towards starting up again. I would probably recommend looking into JMonkeyEngine or LWJGL instead (the former being closer to Java 3D, with a scene graph, while LWJGL is OpenGL in Java so it'd be more low-level).
Also it's extremely unfortunate that Java 3D is/was hosted at java.sun.com because the Oracle acquisition messed up some of the webpages. For example, many of the links at the Wikipedia article for Java 3D are now broken thanks to Oracle. So hopefully you will be able to get to all the downloads and documentation you need; but you might want to check now, before you buy the book!
Personally, I found Java 3D to be rather neat. I didn't do much with it, but I did buy this book and another about Java 3D in an attempt to learn it. It seems to be a well-made API with similar goals to Java (cross-platform - working on all machine, screen, etc. configurations).
One last note: there was one Java 3D game I knew of, called Magicosm (later renamed to Cosm). I was excited about it! But, well, you can read the story on that page. Still, archive.org has a copy of the old website which explained all the game ideas and progress of the game. So it appears that it is definitely possible to make a game in Java 3D.