I understand that your approach in this book is to show the framework through practical development of one or more sample applications, and not a strictly theoretical one.
I read the Eclipse Rich Client Platform book which uses a similar approach.
This is a great way to get your hands dirty right from the beginning, and become familiar with using the tools and the framework elements.
What I didn't find was a comprehensive and shortly descriptive reference of all the concepts used in the book, that could be used to become independent in developing new projects without searching through the book chapters.
Does this book have such a section, sort of a reference summary with a short explanation of the concepts?
We worked hard to write a book that was both a tutorial and a reference. Part 2 is the tutorial and Part 3 is the reference section, or "Deep Dives". Of course there is reference material throughout the book, and the best way to find what you need is via the index (which is pretty extensive). You'll also find tips and tricks presented in boxes and side-bars throughout the book.
I hope you find the book helpful, and thank you for your feedback. We'll certainly keep the idea of a reference summary/index in mind.