Excellent book!
Unhappyly in the Brazil nobody likes here to make development in RAP, RCP and GMF, very difficult to obtain work in these technologies.
You have luck to live and to work outside of the Brazil, the possibilities are enormous to obtain diverse chances.
Here in the Brazil already I tried to show for diverse companies these technologies, them very find difficult to work with this.
But I never intend to lose the hope in working with this. It would like to be Member and Committer of the Eclipse very, but never I obtained. Good luck to that they work with these technologies, that always continue if perfecting in what it likes.

http://www.rap-book.com/code.html

I don’t see any sample chapters though.