The competition for the best Book of Vaadin (TM, Oscar nominee, Patent pending etc) is getting tougher by the day with a newcomer in the books about Vaadin category - this time with PACKT Publishing's Vaadin 7 UI Design by Example.
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The author makes the book an interesting read by linking chapters to real world stories from his own developer background as well as spicing up the text with made up dialogs between himself, the author, and you, the reader. So even if you don't have any questions after reading a chapter and everything seems crystal clear, you still end up reading the dialog where you, the reader, are asking questions about things you didn’t know you didn't know. Confusing? Perhaps, but it's a positive berry in the usually too-fact-filled genre of IT books.
If you're a beginner looking to learn Vaadin and you've started doubting JavaDoc as the most pedagogical way of learning an API, then definitely check out Vaadin 7 UI Design by Example by Alejandro Duarte - available as epub, PDF and hardcopy at packtpub.com