Rapid GUI programming with Python and Qt : the definitive guide to PyQt programming / Mark Summerfield, Prentice Hall, 2008
If you are looking for the best toolset for rapid development of applications, your choice might be Python with Qt. Also, your resulting product will be maintainable and portable. This book is a top guide to programming PyQt, 600 pages and hardcover.
Foundations of Qt development / Johan Thelin, Apress 2007
Here is another great book on the best C++ development environment. QT is more than just a library of GUI functions. It supports XML i/o, I18n, threading, databases, networking, and qmake. Of course, it does portable GUI’s well. Free for open source projects!
C++ GUI programming with Qt 4 / Jasmin Blanchette, Mark Summerfield. Prentice Hall c2008.
Qt is one of the best GUI toolkits for cross platform C++ development. I like this book. Hardcover, 700 pages, a very practical approach, up to date, lots of example code.