Having just upgraded to Zbrush v3.1, I bought this in the hopes of polishing up on my creaky Zbrush skills, unfortunately this book only served to take me BACK a few steps in my knowledge of Zbrush!
Because of the drawn out manner in which things are explained to maximise the wording and pad the book out for example, they explain things in a whole paragraph that could be said in a single sentence! This makes for some very laborious reading and ultimately leads you to give up, being unable to take in any more of this waffle!
The illustrations are in black and white, not a problem you'd think, except they are printed in a very low quality setting. Almost like when your printer is short on ink and striping appears on any images you print out. This could have just been my copy, who knows.
Overall, pretty dire. I sent the book back pretty sharpish!