Well, like I said, I've only taken the briefest of looks at the book so my opinion should be taken with a grain of salt. That begin said, I know that it does give a good number of bite sized and useful code snippets.
I personally keep and HTML copy of the manual on my local server so I've missing the all the errata contained online and in the CHM files. I don't find this too much off a problem, after all the errata is only a connection away, but I did notice that the book had some examples which are much more detailed than the snippets which we all contribute. For example, there's a very good example of unpacking bitwise and hex streams which I would have killed for a couple months ago (at the time I was unpacking ID3 tags from mp3's).
My advice regarding purchasing this, or any, technically orientated book is to head off to your local Chapters (Barnes & Noble, Indigo, whatever), grab a large cup of coffee from the associated coffee joint, and spend at least half hour browsing the book before shelling out your $50.
Book reviews are too subjective to base your purchase decision on someone else's opinion. They can give you an indication of if the book's in the ballpark, but what I think is a grand book on language X may be too advanced, too beginner, too off topic, etc. for your needs and preferences.
-geoff
