This is a great book. I get the feeling that there are 2 common factors shared by all the best IT texts I have read. One, the authors are extremely expert in their subject and two, that they invested the time in 'being bothered' to produce a book of quality.
As a brief synopsis, this book is practically based, as hinted by the title. All the core Solaris subjects are covered in a good amount of detail. What I particularly liked about the book was the authors readiness to highlight both common and sutle pitfalls - something very rare in most of the IT books you get today.
Well done indeed. I won't hesitate in buying another book by these authors.