Kito, I don't know how to get in contact with you but since you are monitering this forum this week, I thought this was as good a place as any. I found a slight error in some of the sample code in the book and thought that since the book isn't printed yet, maybe it could be fixed. I think this would cause some confusion...
In Chapter 13 page 547 you have the following line:
Which should be (I have bolded the addition)
If I find any more issues, would you like me to let you know and if so what would be the prefered way of getting in touch with you.