The answer to your first question: yes I do address web services in the middle chapters of my book.
Second question's answer: I write books because I have information I want to share with others. For me writing is a passion, also, since I am a professor of Computer Science, I feel a large obligation to educate and help. Writing a book for money, if there is money involved, where is it? I write becasue I love to. I also love to learn, and you do learn by writing both articles and books. Check out my articles on Developershed.com and WebSphere Journal, beginning in April. Good to hear from you.