The book is pretty good. It covers alot important components needed for SCJD. Especially the Threads component, it cover more then what is needed. However, two things i'm not 100% satisfy.
The sample project source code is not ready yet. So you can't download it. At least not right now.
The sample code in the book is not 100% clear after reading it. Especially the variables being declared and used. I kind of get confused after reading the souce code and try to understand what the author is trying to focus on.
However, the text itself is very good. After reading few chapters, you will know what you need to accomplish and prepare for the real thing. I just hope the new SCJD 1.4 project(coming soon) will allow you to use all those things mentioned in the book. I just hope...