Mark Summerfield is a computer science graduate with many years experience working in the software industry, primarily as a programmer. He also spent almost three years as Trolltech’s documentation manager during which he founded and edited Trolltech’s technical journal, Qt Quarterly. (Trolltech is now Nokia’s Qt Software.) Mark is the coauthor of C++ GUI Programming with Qt 4, and author of Rapid GUI Programming with Python and Qt: The Definitive Guide to PyQt Programming and Programming in Python 3: A Complete Introduction to the Python Language (from which this short cut is taken). Mark owns Qtrac Ltd., www.qtrac.eu, where he works as an independent author, editor, trainer, and consultant, specializing in C++, Qt, Python, and PyQt.