What you need for this book
Qt and Qt Creator are cross-platform tools. Whether you're using a Windows machine, a Macintosh using Mac OS X, or a workstation running Linux, you probably have what you need. You should have a reasonable amount of disk space (around 10 GB is enough) to install the whole Qt Creator IDE and Qt libraries. As with any software development environment, the more RAM you have, the better (although I've run Qt Creator on netbooks running Ubuntu with a gigabyte of RAM and survived!).
You should have a basic understanding of computer programming and be prepared to write code in C++. Knowledge of JavaScript is helpful if you're interested in programming with Qt Quick, but you can pick that up along the way with little difficulty.
