books to learn Qt

hi,
Can you sugest books,Ebooks or sites to learn Qt

http://www.qtcentre.org/forum/f-qt-p...ighlight=books

I just picked up a couple books from Amazon that I really like (and they're a lot cheaper there than I've found in a local store). I've had a couple years' worth of experience with Qt3, but needed some good reference for Qt4:

C++ GUI Programming with Qt 4

An Introduction to Design Patterns in C++ with Qt 4