Book on KDE/QT

Can anyone recommend a good book on QT and/or KDE programming, ideally on the latest versions? I'm competent in C++ and have written GUIs in java and the occasional single-dialog application in QT and GTK+. That should give you an idea of the level. JDL -- Non enim propter gloriam, diuicias aut honores pugnamus set propter libertatem solummodo quam Nemo bonus nisi simul cum vita amittit.