Choosing a qt4 book

[asieriko]

Hello,
I want to buy a qt4 book, but I don't find any comparatives. What do you think is a good one?
I'm thinking about those:

• The Book of Qt 4: The Art of Building Qt Applications By Daniel Molkentin
• Foundations of Qt® Development By Johan Thelin
• C++ GUI Programming with Qt 4 By Jasmin Blanchette and Mark Summerfield

So what do you think is a good one? Have I forgotten any book?

Thanks