Didnt really enjoy this book at all I thought it was seriously lacking, Luckily I picked up a used copy. The main problem I have is the book just doesn't flow well and just as you are getting to the meat and potatoes of trying to configure something you are told to consult a man page? Tell us something we don't know. The services section I found to be really lacking you can find better documentation for free online.
Next version of the book make a cook book style approach with labs for beginners.
I didn't really learn a great deal from this the writing style is very dry.
Just my honest opinion I will be using the Ubuntu forum and community documentation for future reference