For customers porting applications from Qt 3 to Qt 4, this is bad news, but for us, this is good news, because it means that the owners of book 3 Qt will want to buy this one too. Those who bought this book will: [1] Qt Learn how to program the right way, namely [2] Learn the patterns of Qt programming standards, from basic tasks like making a menu file with a list of files that have long been used for task- more complex tasks such as presenting data to users through the user interface, and provides users with the ability to interact with their data.