the information is spot on
Slow down there. Some stuff there is far from ideal like the chapter on QThread and some parts are obsolete like QHttp/QFtp. On the other hand this has probably been the starting point for many of us so strongly recommended
Another resource for Qt4 is: AQP
And for Qt5 the Cookbook. my feeling is still that this book wastes too much on rather marginal parts of the framework but includes parts that weren't included in the earlier books like web engine.
My personal advice is not to waste money on Ray Rischpater's book
I'm surprised that the QGraphicsView framework is still included in the exam especially after statements like:
Because of the larger than not overlap between Qt Quick 2 and Graphics View, I would expect to see Graphics View moved into a “Compatibility” module for Qt 6.