Although the book is dated, it's still useful in a lot of ways, and personally it's proven to be a great way in keeping me honest as I went through the chapters I deemed useful (avoiding spending time on forums and reading documentation becomes impossible with this book). With that said, I couldn't help think that during it's time this would have been one hell of a book. The layout and approach is fantastic.
In all fairness, I used this book only to get some things I needed to get done, done.
I found out later that it was easier after a while to use the online documentation for what I needed.
For each type of project that you may have, with little experience, this book gives a pretty good introduction on each topic and will give you the big picture, most of the time.
Fantastic book, not for the beginner, but a great explanation of how to use the Qt4 libs for cross-platform application development. I have yet to comprehend why EVERYONE doesn't use Qt4...!?